De-funk Your Tumbler
July is National Parks and Recreation Month, and summer park days, hikes, sports, and outdoor events all have one thing in common: you need to stay hydrated. But you reach for your favorite reusable bottle or tumbler and discover it has a bad smell. Maybe it wasn’t cleaned out right away, or maybe it was capped before it fully dried. No matter how it happened, here are some steps to try before tossing it.
- Start with a basic clean. Wash the bottle, lid, straw, gasket, and removable pieces with warm water, dish soap, and a bottle brush or toothbrush.
- Check the gasket. If it is designed to come out, gently remove it and scrub both sides. Take a quick photo first if you’re worried about getting it back in correctly.
- Scrub the gasket groove. This hidden channel can trap moisture, residue, and odors, even when the rest of the lid looks clean. A toothbrush or straw brush can help get into small spaces.
- Vinegar. Soak removable pieces in equal parts white vinegar and warm water for 20–30 minutes. For stronger smells, let them soak for 1-2 hours. Scrub, rinse well, and wash again with dish soap.
- Baking soda. Mix baking soda with a little water to make a thick paste. Rub it onto the gasket, gasket groove, or other funky areas. Let it sit for 15-20 minutes, or up to an hour for stronger smells, then scrub and rinse well.
- Denture tablet or bottle-cleaning tablet soak. Use warm, not hot, water. Let removable pieces soak for 30-60 minutes, or longer. After soaking, scrub, rinse thoroughly, and wash again with dish soap.
- Hydrogen peroxide. Use 3% hydrogen peroxide and soak removable pieces for up to 15 minutes. Rinse well and wash again with dish soap.
- Dry everything completely. Let every piece air-dry before putting the lid back together. Trapped moisture can bring the smell right back.
- Put the gasket back carefully. Make sure it sits flat in the groove with no twisting, bunching, or folding. If it is not seated correctly, the bottle may leak.
- Know when to replace the gasket. If the gasket is cracked, torn, stretched out, sticky, brittle, pitted, or still smells bad after deep cleaning, replace just the gasket instead of tossing the whole bottle. Check with the manufacturer first, since many brands sell replacement gaskets or lids. You may also be able to find a compatible off-brand gasket, but make sure it is food-safe, fits securely, and doesn’t cause leaks.
Important note: don’t mix cleaning products. Rinse well before switching methods, and avoid bleach or harsh chemicals on drinkware.
Image by Ser Amantio di Nicolao.