How to Remove Odors from Your Reusable Cup
By KeepCup® | Reusable Cups, Bottles & Bowls — Made for ... | Published: 2026-10-17
Category: Tips & Care
Learn how to remove stubborn odors from your reusable cup, including cork glass cups, insulated bottles, and boba straw lids. Simple, effective cleaning tips.
Quick answer
To remove odors from your reusable cup, start by identifying the source. For most cups, a soak with baking soda or white vinegar works. For cork glass cups, avoid harsh scrubbing. For insulated bottles, a bottle brush and a baking soda soak are effective. For boba straw lids, disassemble and soak all parts.
Identify the Odor Source
A stale smell in your reusable cup usually comes from trapped moisture, leftover coffee or tea residue, or bacteria in hard-to-reach areas. Cork glass cups can absorb odors in the cork band. Insulated water bottles may hold smells in the mouthpiece or seal. Boba straw lids can trap residue in the straw opening and lid mechanism.
General Cleaning Method
For most cups, a simple soak with a mixture of warm water and baking soda (1 tablespoon per cup of water) for 15–30 minutes can neutralize odors. Rinse thoroughly. For stubborn smells, use white vinegar (1 part vinegar to 3 parts water) instead, then rinse well. Avoid using bleach or abrasive cleaners on any reusable cup.
Special Considerations for Different Cup Types
Cork glass cups: Clean the cork band gently with a damp cloth and mild soap. Do not submerge the cork in water. Insulated bottles: Use a bottle brush to reach the bottom. Remove the mouthpiece if possible and soak separately. Boba straw lids: Detach the lid from the cup. Soak the lid and straw in a baking soda solution. Use a small brush to clean the straw opening.
Odor Diagnosis Guide
- Symptom: Musty or sour smell: Likely caused by moisture trapped in the lid, straw, or cork band. If the cup has been left unwashed for more than 24 hours, bacteria may have started to grow. Action: Soak in baking soda solution. If smell persists, check the cork band or lid seal for trapped moisture.
- Symptom: Coffee or tea odor: Residue from coffee or tea can cling to glass or plastic surfaces, especially in the lid or straw. This is common with boba straw lids and insulated bottles. Action: Use a vinegar soak. If the smell remains after cleaning, the lid or straw may need replacement.
- Symptom: Plastic or chemical smell: New plastic cups or lids can have a temporary odor from manufacturing. This usually fades after a few washes. If it persists, the material may be degrading. Action: Wash with warm soapy water. If the smell does not fade after 3–4 washes, consider replacing the cup or lid.
Products That Help
- Boba Straw Lid for Glass Cup: Keep your boba straw secure and your drink spill-free with this Boba Straw Lid designed for KeepCup Glass Cups. This accessory adds a practical touch to your reusable cup, making it easy to enjoy your favorite bubble tea or iced beverages on the go. The Boba Straw Lid for Glass Cup has a straw opening that can trap residue. Regular cleaning of this part prevents odors from building up in the lid mechanism.
- Ora Insulated Water Bottle: The Ora Insulated Water Bottle offers a convenient and hygienic way to stay hydrated while on the move. Designed with a push-and-flip mechanism, it allows for one-handed, touch-free access, so you can take a sip without breaking your stride or worrying about germs. The push-and-flip mechanism of the Ora Insulated Water Bottle has small crevices where bacteria can grow. Disassembling and cleaning these parts is key to eliminating smells.
