4 Piece, Plastic Flexible Bowls That Snap Together To Easily Pour Ingredients, Incudes 1/4 Cup, 1/3 Cup, 1/2 Cup & 1 Cup, Silicone Is Great For Non-Stick Cookware & Bakeware & Will Not Scratch The Surface, Resistant To Odors & Stains, Food Safe Silicone With Heat Resistant Up To 475 Degrees.