Our products are easy to clean and can take a beating! Rinse with mild detergent soap and warm water; throw them in the dishwasher; or take a garden hose to ’em; All of the above are acceptable wash methods. Occasionally (although rarely) a drink may leave a slight odor in a cup, but that can be remedied with a thorough washing or soaking with baking soda or vinegar.We don’t use any toxic sealants for our Silipint cups so sometimes (though rarely) the silicone can stain with certain drinks, such as coffee or tea. The best way to avoid this is to choose a cup color that won't stain with your drink. You can also reduce staining by immediately cleaning you cup after use.  If you have a stain that seems to have set in we recommend soaking your cup in 3% Hydrogen Peroxide for 24 hours.