Features:- Make every day refreshing with the Harry Potter tumbler, aka the coolest cup ever. Our Slytherin tumbler cup is crafted from stainless steel with proprietary triple insulation, keeping contents cold and refreshing for 9+ hours and hot for 3. Stays cold even longer with drinks containing ice. Plus, it comes with a sliding, shatterproof, see-through lid.- Stay-put, silicone bottom.- Signature, flat sides.- BPA free.- 16 oz.