We recommend cleaning your Chilly's Bottle regularly with hot soapy water and rinsing the bottle after each use. When not using your bottle, store it without the cap on to allow the inside to dry out. Do not put your Chilly's Bottle in the dishwasher or leave the bottle to soak in water for a long period of time. This can cause paint damage and can lead to the vacuum becoming ineffective. Click here to learn more.