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 you're 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.  Top Rack Dishwasher Safe Non-Slip Silicone Base Spill Resistant & Shatterproof BPA-Free Tritan Lid Cup Holder Friendly Thicker Professional Grade 18/8 Stainless Steel Triple Insulated Vacuum Sealed Technology