Vacuum insulated: Double wall vacuum insulated to maintain temperature.Spill resistant: Tri-mode lid for flow control Tri-mode lid for flow controlNon-slip silicone baseDurable: 18/8 Stainless steel with full powdercoat finish. Dishwasher safe. 18/8 Stainless steel with full powdercoat finish. Dishwasher safe.Drink Clean: BPA, BPS, and BPF free