Base and edge: 30% glass fibre reinforced nylon. 66 side walls: 100% silicone Imported Lightweight collapsible camping bowls perfect for backpacking where weight and space are at a premium Collapses to less than 2 centimeters - ideal for space-conscious adventurers High quality, EU food-grade materials deliver lightweight durability The curve between the sidewalls and base perfectly matches Sea to Summit spoons - so you'll never miss a morsel Base and rim utilize durable glass-reinforced nylon 66, sidewalls are made of food-grade silicone rubber; Medium capacity 23 fluid ounces (680 milliliters); Medium Bowls nest inside a Frontier 2 liter collapsible pot; Sea to Summit Guarantee is offered for the Lifetime of this product