Lose the stem. Keep the cool.Crafted from stainless steel with proprietary triple insulation, this vacuum-sealed wonder cup just doesn’t quit. The triple insulated stainless steel will keep your beverages cold for 9+ hours and hot for 3. Stays cold even longer with drinks containing ice — even out in the sun.• 12 ounces• Slip-proof, silicone bottom• Easy-grip sides• Sliding, spill resistant lidIncludes 1 Tumbler + 1 Tumbler Lid