Splash, impact, and shatter resistant lids give your drink security as well as insulation; Dishwasher safe or can be hand washed with warm soap and water Double lipped waterproof bond aids in keeping your drink insulated; The open/close slider helps prevent spills and prevent heat from escaping or ice from melting Dual-temp insulation system will keep your drinks hot or cold for hours, while the leak-proof liner will ensure a full day of enjoyment Mix and match colors to differentiate drinks at parties and gatherings, prevent mix ups with other’s beverages, match your favorite sports team’s colors, or just to brighten things up NorChill products are manufactured both in the USA and overseas using technology designed and developed with American ingenuity