The inner tank is made of 304 stainless steel, which is durable and not easy to scale. Full-film vacuum multi-layer technology, multi-layer insulation technology locks the temperature to drink hot water at any time. High vacuum stainless steel leisure cup Silicone Handle not easy to break ,Wear-resistant PP Cover With Inner Steel Core 304 Stainless Steel Liner 201 Stainless Steel Non-slipdrop resistant. Silicone pad easy to clean.Removabled non-slip! Capacity:320ml