Is reusing water bottles safe?

Dear Reader, 

In the quest to meet your daily water quota, finding the perfect reusable water bottle can be greatly advantageous. Whether you take your water chilled or at room temperature, keeping your water bottles clean is critical. While it’s recommended that you wash your water bottles often, it really depends on how often you use them, and what you use them for. Using hot and soapy water, trying not to miss any spots, and letting the bottles completely air dry are some ways to keep your water bottles squeaky clean. For plastic water bottles, being aware of the risks associated with chemical leaching could help inform your hydration habits. Keep reading to learn more! 

The bottles you refill daily are also due for a daily cleaning. Throughout the day, all sorts of bacteria can accumulate in your bottle, including Salmonella, E. coli, and Staphylococcus aureus. When ingested, these bacteria can cause skin and gastrointestinal infections, food poisoning, allergic reactions, respiratory issues, and other illnesses. Mold, bacteria, and other residues may be more likely to form if the bottles are used for sugary drinks. Additionally, using your water bottle in the sun, the gym, or other warm areas may also contribute to undesired bacteria growth. If your bottle is used in a warm environment or for sugary beverages, consider washing it as soon as possible after use. 

When it comes to washing your reusable water bottle, be sure to: 

• Use hot water and soap. 
• Deconstruct the bottle as much as possible (this may include taking out the straw, mouthpiece, or any other applications). 
• Scrub all parts of the bottle. 
• Rinse off the soapy water thoroughly. 
• Allow your bottle time to completely air dry. 
• Fill the bottle with a mixture of soap, vinegar, baking soda, and water, letting it soak overnight if your bottle needs deep cleaning. 

List adapted from Nuvance Health 

Keep in mind that these are general tips for reusable water bottles. Depending on the brand and materials of your bottle, these methods may vary. Check out the water bottle brand’s website for more information specific to you.  

Regarding reuse of single-use plastic water bottles, manufacturers intend for them to be single-use for a reason. Not only are they more difficult to thoroughly clean due to their narrow openings, but they may be more prone to chemical leaching. Chemical leaching describes a phenomenon when the chemicals of a plastic container begin to mix with the liquid held in the container. Leaching may occur due to long storage times or because of exposure to warm temperatures. Some chemicals shown to leach include: 

• Antimony: Short-term exposure could cause diarrhea, vomiting, and nausea. Long-term exposure may cause heightened blood sugar levels and cholesterol. 
• Bisphenol A (BPA): Exposure may lead to heart disease, high blood pressure, type 2 diabetes, and may affect fetal, infant, and child development. 
• Phthalates: Exposure to this chemical could affect the brain development and growth of children. It may also increase allergies.  

List adapted from WebMD 

If you’re concerned about chemical leaching, look for products labeled “BPA-free” and “phthalate-free,” avoid exposing your plastic products to heat, and consider using stainless-steel or glass bottles.  

Because you mention enjoying chilled water, it may be beneficial to switch to a reusable bottle. Choose the material of this bottle (plastic, stainless steel, or glass) that fits your lifestyle and concerns!  

Stay hydrated!