Stanley Master 0.53 Lt. Vacuum Cup Thermos 10-02661-018 Product Features 1.0mm 18/8 stainless steel, BPA free. The strongest you can find. It does not rust and is natural. QuadVac™ insulation preserves hot1 12 hours and cold drinks 16 hours. Does not leak, easy to carry Steel lined cover and steel carrying ring Dishwasher safe Compatible with car glass compartment. Technical Specifications Capacity: 0.53 Lt Weight: 0.51 gr Dimensions: 7.6x 7.6 x 23.1 cm Hot: 12 Hours Cold: 16 Hours Frosted: 48 Hours Lifetime warranty Technologies used QuadVac™ QuadVac™, double-walled vacuum insulation, adding a double-layer barrier made it store hot or cold drinks much better than any thermos you can find. The 4-layer insulation offers the highest thermal protection against conductivity, permeability and radiant energy emission.