Drinking through a straw carries a few genuine health considerations, but most of them are smaller or more nuanced than the warnings circulating online suggest. The biggest concerns have shifted in recent years: away from the straw itself as a drinking tool and toward what the straw is made of. Paper and plant-based alternatives marketed as eco-friendly turn out to contain chemicals that plain plastic straws do not, reusable metal and glass straws carry a measurable injury risk, and the long-standing advice to avoid straws after wisdom tooth removal may rest on shaky evidence. Meanwhile, for certain populations, straws remain a genuinely important tool for independence and safe swallowing.
What Straws Do to Your Teeth
One of the most persistent claims about straws is that they protect your teeth from sugary or acidic drinks. This one actually holds up reasonably well. A videofluoroscopic study comparing straw and cup drinking found that when participants used a narrow straw positioned toward the back of the mouth, the liquid bypassed both the front teeth and molars in a significant number of cases. Contact time of fluid with the front teeth was also reduced compared to sipping from a cup.1PubMed. A videofluoroscopic comparison of straw and cup drinking: the potential influence on dental erosion – Section: RESULTS A separate study looking at plaque acidity found that drinking fruit juice through a straw produced a smaller pH drop in dental plaque than drinking from a cup or swishing the juice around the mouth. A less dramatic pH drop means less acid attack on enamel, which could reduce demineralization over time.2PubMed. The effect of different methods of drinking on the pH of dental plaque in vivo
The catch is that placement matters. If you clamp the straw between your front teeth and let the liquid wash over them, you lose most of the protective effect. Positioning the straw further back, past the teeth, is what makes the difference. For people who drink a lot of coffee, juice, soda, or wine and worry about staining or erosion, this is a real if modest benefit. It is not a free pass to drink unlimited acidic beverages, but it does reduce the direct chemical exposure your enamel faces.
The Dry Socket Myth
If you have ever had a tooth pulled, especially a wisdom tooth, you were probably told not to use a straw for a week or more. The logic sounds intuitive: the suction might dislodge the blood clot forming in the socket, leading to dry socket, a painful complication where bone and nerves become exposed. Dentists and oral surgeons have repeated this advice for decades, and it is one of those instructions that feels too specific to question.
A controlled study that tracked over 200 tooth extractions challenged this directly. Patients were randomly assigned to either use a straw or avoid one during recovery. Dry socket occurred in 15% of straw users and 15% of non-users in the lower jaw, and in no patients at all in the upper jaw.3PubMed Central. Straws do not cause dry sockets when third molars are extracted – Section: RESULTS That is an identical rate. The researchers concluded that straw use did not increase dry socket risk. This is one study, and most oral surgeons still give the standard advice out of caution, but the evidence behind the recommendation is thinner than people assume. Smoking, poor oral hygiene, and the difficulty of the extraction itself are much stronger predictors of dry socket.
PFAS in Paper and Plant-Based Straws
Here is where the health picture gets genuinely uncomfortable. As plastic straw bans spread, paper and bamboo straws became the default alternatives. These plant-based straws need to resist getting soggy in liquid, and one common way manufacturers achieve that is by treating them with per- and polyfluoroalkyl substances, the family of persistent chemicals known as PFAS or “forever chemicals.” PFAS do not break down easily in the environment or in the body and have been linked to a range of health concerns at higher exposures, including effects on thyroid function, immune response, and certain cancers.
An analysis of 43 brands of straws found that while none of the tested plastic straws contained measurable PFAS, 21 different PFAS compounds were detected across paper and other plant-based straws. Concentrations ranged widely, from trace amounts to roughly 29 nanograms per straw.4PubMed. The last straw: Characterization of per- and polyfluoroalkyl substances in commercially-available plant-based drinking straws A second, broader assessment using both targeted and screening approaches confirmed this pattern. PFAS were found in almost every type of straw tested except stainless steel, and they showed up more frequently in plant-based materials like paper and bamboo.5PubMed. Assessment of poly- and perfluoroalkyl substances (PFAS) in commercially available drinking straws using targeted and suspect screening approaches
The irony is hard to miss. People switched to paper straws partly over health and environmental concerns about plastic, only to encounter a different chemical issue. Whether the PFAS levels in a single straw pose a meaningful health risk during normal use is debated, and the per-straw doses are small. But PFAS accumulate in the body over time, and drinking straws are just one of many daily exposure routes alongside food packaging, nonstick cookware, and treated textiles. For people actively trying to reduce their PFAS burden, stainless steel or untreated glass straws are the cleanest options.
What Leaches from Plastic
Plastic straws have their own chemical baggage, though it overlaps more with general concerns about plastic food contact materials than anything straw-specific. Research on disposable plastic and paper food containers has confirmed that hazardous substances can leach into liquids, including phthalates, potentially toxic elements like lead and cadmium, and microplastics.6PubMed Central. Leaching of Potentially Toxic Elements from Paper and Plastic Cups in Hot Water and Their Health Risk Assessment – Section: Results Heat accelerates this process considerably. A plastic straw sitting in an iced drink is different from one soaking in hot coffee.
This is worth keeping in proportion. The leaching that occurs from a thin straw during the few minutes you use it is going to be far less than what happens with a full plastic cup holding the same drink for the same duration, simply because of the difference in surface area in contact with liquid. Straws are not the main plastic exposure risk in your kitchen. But if you regularly use plastic straws in hot drinks, switching to steel or glass for those specific beverages is a reasonable step.
Researchers exploring alternatives made from rice crop waste found that their experimental straws leached well below standard permitted limits across acidic, alkaline, carbonated, and fatty beverages, and across temperatures from refrigerated to near-boiling.7iScience. Eco-friendly, adhesive-free, smart drinking straws from rice crop waste – Section: Results and discussion This kind of work signals where the market is heading: toward plant-based straws engineered to avoid both the sogginess problem and the PFAS treatment that currently solves it.
Physical Injuries from Reusable Straws
As reusable straws made of metal, glass, and hard plastic have become common, emergency departments have seen a specific consequence. An analysis of straw-related emergency visits found a 46.5% increase in injuries from 2012 to 2021. The most common cause was poking injuries, accounting for over half of all cases. Falls while holding a straw in the mouth, foreign body incidents, and running and falling made up the rest. Lacerations and oral injuries were significantly more common with reusable straw materials than with disposable ones.8PubMed. The Last Straw: Trends in Straw-Related Emergency Department Visits – Section: RESULTS
This risk is highest among children and tends to involve metal straws in particular. A flimsy disposable straw bends or crumples on impact. A stainless steel straw does not. A child who falls face-first while drinking from a rigid metal straw can sustain puncture wounds to the soft palate, the back of the throat, or even the eye area. Several severe cases, including at least one death in the UK, have made headlines. For young children, silicone straws or soft-tipped reusable straws offer a middle ground between disposable waste and the rigidity hazard of metal or glass.
Keeping Reusable Straws Clean
Any reusable straw is a narrow tube that stays wet for extended periods, which is a setup that bacteria enjoy. A systematic review of reusable versus disposable consumer goods found that while reducing single-use items has clear environmental benefits, improper cleaning of reusable items could result in greater risks of disease transmission. The review also noted that despite a large body of related literature, there is very little evidence that either reusable or disposable food serviceware is clearly safer than the other for minimizing infectious risks.9International Journal of Infection Control. Do reusables pose greater infectious risks than disposables for consumer goods? A systematic literature review
In practice, this means the risk from a reusable straw tracks closely with how well you clean it. A quick rinse under the tap is not enough. The inside of the straw, where residue from milk-based drinks, smoothies, or sugary beverages can linger, needs mechanical cleaning with a brush. Most reusable straws ship with a thin cleaning brush for exactly this reason. Dishwasher-safe straws simplify the process, but even then, a periodic manual brush-through prevents biofilm buildup in spots the dishwasher spray cannot always reach.
Gas and Bloating
You may have heard that drinking through a straw makes you swallow extra air, leading to bloating, gas, or abdominal discomfort. The mechanism is plausible: when you sip through a straw, especially when the drink level is low and you are pulling in more air than liquid, you can swallow small amounts of air alongside each sip. Over time, this contributes to the total gas volume in your digestive tract.
That said, the practical effect is modest for most people. Normal human digestion produces a significant volume of gas on its own through bacterial fermentation of food, and the amount added by straw-related air swallowing is relatively small in comparison. If you already deal with conditions like irritable bowel syndrome or functional bloating, the extra air might push you over a comfort threshold more easily. For everyone else, this is a real but usually minor effect. Drinking slowly, keeping the straw submerged in the liquid, and not sucking air through an empty cup all reduce the issue.
Who Genuinely Needs Straws
The wave of straw bans and social pressure to refuse straws has created a real tension for people who depend on them. For individuals with motor disabilities, limited hand strength, spasticity in the upper limbs, or conditions like cerebral palsy, a straw is not a convenience but a tool for basic hydration. A case study documented how a cup with a lid and straw was implemented for a child with cerebral palsy specifically because the child’s spasticity and limited range of motion in the upper limbs prevented holding and tilting a cup.10Scientific Electronic Library Online (SciELO). Effects of the Use of Assistive Technology Devices to Promote Independence in Daily Life Activities for a Child with Cerebral Palsy – Section: 2.6 Intervention Metal and glass alternatives are not always suitable replacements in these contexts, since a person with tremors or involuntary movements faces an injury risk with rigid materials. Flexible, bendable straws, the single-use plastic kind being phased out, remain the safest and most functional option for many disabled individuals.
In pediatric development, straw drinking also plays a functional role. It is one of the few feeding activities performed against gravity, requiring coordinated lip closure, tongue channeling, cheek contraction, and rhythmic jaw movement. This coordination supports the development of the suck-swallow-breathe pattern, and can reduce sputtering in young children by strengthening oral-motor rhythms.11SciELO – Scientific Electronic Library Online. Description of oral-motor development from birth to six years of age – Section: Straw Pediatric speech-language pathologists sometimes prescribe straw drinking exercises to build oral strength and coordination in children with feeding difficulties.
Straws and Swallowing Disorders
For adults with swallowing difficulties, the picture is more complicated. Some speech-language pathologists have historically advised against straws for patients with dysphagia, worried that the liquid delivered via a straw might be harder to control and increase the risk of aspiration, where liquid enters the airway instead of the esophagus. A study that directly compared straw and cup drinking in patients with oropharyngeal dysphagia found no statistically significant difference in aspiration risk at any volume tested, from small sips to larger amounts.12PubMed Central. Straw vs Cup Use in Patients with Symptoms of Oropharyngeal Dysphagia – Section: Results The study was small and does not settle clinical practice on its own, but it suggests that blanket bans on straw use in dysphagia patients may not be well justified. Individual assessment still matters: some patients do better with straws because they control flow rate, while others do worse because the delivery position differs from a cup.
How Straw Material Changes the Way Drinks Taste
Beyond health, straw material has a measurable effect on the sensory experience of drinking. A study with 134 participants found that unsweetened cold black tea tasted different depending on whether it was consumed through a plastic, paper, copper, stainless steel, or silicone straw. The differences showed up in flavor liking, mouthfeel liking, and perceived sourness intensity. The straws also evoked different emotional responses in the drinkers.13Elsevier. A sip of joy: Straw materials can influence emotional responses to, and sensory attributes of cold tea
Anyone who has sipped a cocktail through a copper straw or tried to enjoy a smoothie through paper that is already going soft will find this unsurprising. Metal straws can impart a slight metallic tang, particularly with acidic drinks. Paper straws can contribute a wet-cardboard quality and often alter mouthfeel by absorbing some of the liquid. Silicone tends to be the most neutral material for taste, though some people dislike the rubbery texture against their lips. If you find yourself disliking a drink more when you use a straw, the straw material might be the culprit rather than the drink itself.
Choosing a Straw Material
With all of these factors in play, the choice of straw material involves genuine tradeoffs rather than a single best option. Here is how the main options stack up on health-relevant dimensions:
- Stainless steel: No PFAS detected in testing, no chemical leaching concern, easy to sterilize in a dishwasher. The main drawback is injury risk, especially for children, and the potential for altering the taste of acidic or delicate beverages. Not suitable for people with motor control difficulties.
- Glass: Chemically inert and neutral in taste. Fragile, obviously, and carries the same rigidity risk as metal if someone falls. Borosilicate glass straws are more durable than standard glass but still not safe for young children.
- Silicone: Flexible, reducing injury risk. Taste-neutral in most tests. Heat resistant. Cannot be recycled in most municipal systems but lasts a long time with proper care. A reasonable compromise for families with children.
- Paper: Intended to be disposable and compostable. Frequently contains PFAS. Degrades during use, altering mouthfeel and potentially releasing fibers. Functional for a single cold drink but not ideal for extended use or hot beverages.
- Bamboo and other plant-based: Often treated with PFAS for water resistance, similar to paper. Less studied for long-term leaching. Environmental credentials vary depending on sourcing and treatment.
- Plastic (single-use): No PFAS detected in tested samples. Low chemical leaching for cold drinks. Minimal injury risk. Massive environmental cost if not recycled, and recycling rates for straws are poor. Remains the most accessible option for disabled users who need bendable, lightweight straws.
No single material wins on every dimension. Stainless steel is the cleanest from a chemical standpoint but the most dangerous physically. Paper solves the waste problem while introducing a chemical one. Plastic is the safest to use but the hardest to justify environmentally. For most healthy adults, a silicone or steel straw, cleaned properly, represents the best balance. For settings with young children, silicone has a clear safety edge. For disabled individuals who need a bendable straw, single-use plastic remains the most practical and safest option, and policies that eliminate it without providing functional alternatives create a real barrier to daily life.