How do you get the coffee smell out of a tumbler?

Soak it with warm water and baking soda for 15–30 minutes, scrub with a bottle brush, and rinse. Clean the lid and gasket separately, since coffee oils collect there, and dry everything fully.

Why does my tumbler smell even after washing?

The smell usually hides where a quick rinse can't reach — under the lid's silicone gasket, inside the straw, and in the slider. Disassemble the lid and clean those parts to fix it.

Can I use vinegar to clean a stainless tumbler?

Yes. A 1:3 mix of white vinegar and water lifts odor and mineral film. Soak, scrub, and rinse well; it's safe for 18/8 stainless steel.

How to remove smell from an insulated tumbler

Fill the tumbler with warm water and a tablespoon of baking soda (or a 1:3 vinegar-water mix), let it soak 15–30 minutes, scrub, and rinse. Then disassemble and clean the lid, gasket, and straw — that's usually where the smell hides — and air-dry every part fully before reassembling.

A stainless tumbler that smells of old coffee, mildew, or metal almost always has residue hiding somewhere a quick rinse doesn’t reach. Clear that out and the smell goes with it.

Why tumblers get a smell

Three culprits: oils from coffee, tea, or dairy that cling to the inside; moisture trapped under the lid’s gasket or in the straw that turns musty; and mineral film from hard water. The stainless body itself doesn’t hold odor — the residue and the trapped damp do.

The baking soda method

Fill the tumbler with warm water and add about a tablespoon of baking soda.
Let it soak 15–30 minutes (longer for a stubborn smell).
Scrub the inside with a bottle brush, paying attention to the bottom seam.
Rinse thoroughly.

Baking soda neutralizes odors rather than masking them, which is why it works on coffee and mildew alike.

The vinegar method

For a musty or metallic smell and mineral film, use a 1:3 mix of white vinegar and water. Fill, soak 15–20 minutes, scrub, and rinse well. Vinegar lifts odor and hard-water film and is safe for 18/8 stainless steel. (Don’t leave vinegar sitting for hours — a short soak is enough.)

Don’t forget the lid

This is the step most people skip, and it’s where the smell usually lives. Pop out the silicone gasket, and if the lid has a straw, run a thin straw brush all the way through it. Wash the lid, gasket, and straw in warm soapy water. Our straw-lid cleaning guide walks the full disassembly.

Stop it coming back

Rinse after every use, especially with coffee, juice, or dairy.
Air-dry fully — leave the lid off and the straw standing so nothing stays damp.
Don’t store it sealed and wet, which is exactly how a musty smell starts.

Do that and the tumbler stays fresh — the 20 oz and other TILUCK tumblers have an electro-polished interior that resists odor to begin with, so a quick routine keeps them clean.