Quick Answer

Clean your stainless steel cup with warm water, mild dish soap, and a soft sponge. For stubborn coffee stains or odors, use a paste of baking soda and water or a vinegar rinse. Avoid abrasive scrubbers and bleach to protect the finish.

Why Stainless Steel Cups Stain and Smell

Even high-quality stainless steel cups can develop brown coffee or tea stains and lingering odors, especially if you leave liquids sitting for hours. The porous nature of dried residue and tannins in coffee and tea can bond to the metal surface, while protein shakes and milk-based drinks can leave a sour smell. Regular cleaning prevents buildup and keeps your cup fresh.

What You'll Need

You likely already have the essentials: mild dish soap, a soft sponge or bottle brush, baking soda, white vinegar, and warm water. Avoid steel wool, harsh chlorine bleach, or abrasive powders, as these can scratch the surface and damage the protective layer of the stainless steel. A clean microfiber cloth is ideal for drying to prevent water spots.

Step-by-Step Cleaning Guide

  1. Rinse Immediately After Use: Empty the cup and rinse it with warm water as soon as possible. This prevents coffee, tea, or protein residue from drying and bonding to the surface. Don't let liquid sit for hours—rinse right after your workout or coffee break.
  2. Wash with Soap and a Soft Brush: Use a few drops of mild dish soap and a bottle brush or soft sponge. Scrub the interior, lid, and threads thoroughly. Pay extra attention to the bottom corners where residue hides. A bottle brush reaches deeper than a sponge and prevents scratching the interior finish.
  3. Remove Stubborn Coffee Stains with Baking Soda: Make a paste with 2 tablespoons of baking soda and a little water. Apply it to stained areas and scrub gently with a soft brush. Let it sit for 5 minutes before rinsing. Baking soda is mildly abrasive but safe for stainless steel—it lifts stains without scratching.
  4. Eliminate Odors with a Vinegar Soak: Fill the cup with a 1:1 mixture of white vinegar and warm water. Let it soak for 15–30 minutes, then rinse thoroughly with clean water. For strong smells, add a teaspoon of baking soda during the soak. Vinegar neutralizes odors naturally. Always rinse well to avoid a lingering vinegar smell.
  5. Dry Completely Before Storing: Dry the cup upside down on a dish rack or with a clean microfiber cloth. Leaving it wet can encourage bacteria growth and water spots. Never store a damp cup with the lid on—trapped moisture leads to musty smells.

Product Spotlight

  • Stainless Steel Cup: The Stainless Steel Cup in Hollywood Pink & Stone is designed for athletes who demand performance from every piece of their gear. It keeps drinks cold and is built to handle daily workouts. Choosing a durable, well-made cup with a smooth interior makes cleaning easier and reduces the chance of stains and odors sticking.