Prep your meals for the day with the Glass Prep Bowl Set including four 12oz bowls. Marked with measurements and nest neatly inside S’well Eats 21.5oz food bowls or can be used alone. Microwaveable and top-rack dishwasher-safe. Made of durable, tempered glass. Includes leak-resistant, pop top lids. BPA/BPS-free, eco-friendly and reusable. Compliant with California Prop 65 regulations. You won't have to compromise fashion and functionality to live more sustainably with our sleek, beautifully crafted, built to last products.