WASHING YOUR BOTTLES, CUPS, CANISTERS AND CAPS Our Classic and Wide-mouth bottles (in Brushed Stainless finish) are dishwasher safe. As are our pint cup and single-wall food canisters. We recommend handwashing painted and all vacuum insulated bottles, vacuum insulated tumblers and vacuum-insulated canisters. For thorough cleaning, you can use warm, soapy water and a bottle brush. We also recommend an old-fashioned cleaner: mixing water and baking soda making a nice thick paste. If your bottle or cap seems to be retaining flavors or smells, use diluted vinegar and soak them in it overnight. NOTE: the Stainless Unibody Bamboo Cap should not be soaked or immersed. All Kid Kanteen and Classic caps (except the Stainless Unibody Bamboo Caps) and all Wide caps are dishwasher safe. The Café Cap is dishwasher safe and the rotating piece on the top also pops out for thorough cleaning. The original Stainless Loop and Flat Caps must be handwashed because they were constructed with two materials: stainless steel (threads) and polypropylene (top), because of such they must be handwashed to ensure that water doesn’t work itself into the stainless cavity.