Vacuum Insulated: Double wall vacuum insulated to maintain temperature Durable: / Stainless steel with powdercoat finish Stays Dry: Sweatproof insulation Easy to Clean: Cap top rack dishwasher safe. Hand wash stainless steel vessel Drink Clean: BPA, BPS, and BPF free Universal Cap: Compatible with Eddy®, Chute® Mag, and Hot Cap vessels Hours Cold, Hours Hot