Stainless steel inside (so the bottle won't break when it falls). Doubled walled with rubber accent and locks well, reducing the chance of leaking. Handy drinking cup with rubber underside serving as an anti-skid layer and avoiding the cup from falling down.

• Material: Plastic, Stainless Steel
• Capacity: 20 Ounces or More
• Set Include: 1 Piece
• Care Instruction: Hand Wash
• Color: Black, Silver

Material: Plastic, Stainless SteelBergHOFF