Swig 32 oz Matte Tumblers keep drinks cold up to 9 hours and hot up to 3 with double walled vacuum sealed copper coated insulation And when youre finished run it through your dishwasher A silicone base minimizes slips and tips plus it gives you a quiet landing when you put your tumbler down The SEAL-TITE Tritan lid is BPA-Free spill resistant and shatter proof Hand wash only Non-Slip Silicone Base Spill Resistant Shatterproof BPA-Free Tritan Lid Cup Holder Friendly Thicker Professional Grade 188 Stainless Steel Triple Insulated Vacuum Sealed Technology