Keeping your stanley tumbler clean isn't just about appearance -- it's about hygiene and performance. Here's how to do it right, with the supplies you probably already have at home.
Remove the lid and any removable parts including the straw. The Stanley lid has multiple parts that need separate cleaning.
Fill the tumbler with hot water and dish soap. Scrub with a bottle brush to reach the bottom and sides.
Use a thin straw cleaning brush to scrub inside the straw. Mold grows here if not cleaned regularly.
Use a toothpick or small brush to clean inside the gasket groove on the lid where mold and residue accumulate.
For smells, fill with hot water, 2 tablespoons baking soda, and 1 cup vinegar. Let fizz for 30 minutes, then rinse and air dry.