Our 20 oz stainless steel straight-sided tumblers are double-walled and vacuum insulated to keep your drink at the perfect temperature all day long. Keeps drinks hot for up to 8 hours and cold for up to 12 hours! Tumblers are made using sublimation transfers. No harmful chemicals, epoxy, or vinyl used. They are dishwasher safe, however hand washing is recommended to preserve the life span of your tumbler. Some tumbler designs may have a visible seam. Packaged in a white box with a non-slip silicone base, lid, straw, and straw cleaner. Images may vary slightly from your monitor, phone screen, tablet due to the screen resolution/brightness. Due to the handmade nature of this item, there may be small variable differences between tumblers. Handmade in Denver, Colorado.