Premium Food-Grade Material: The glass mixing bowls are made of high borosilicate glass, featuring a thickened design for enhanced durability and safety in daily use. The raised, thickened rim design enhances durability and provides a more secure grip when mixing, lifting, or pouring. Withstands temperatures from -4°F to 1040°F (-20°C to 560°C). Microwave, oven, refrigerator, and dishwasher safe. The BPA-free lid ensures safety and reliability while being easy to clean. Multi-Size Set: The glass mixing bowls with lids set offers 5 sizing (4.78QT,2.2QT,1.7QT,1.1QT,0.85QT) to handle any kitchen challenge. 4.78QT large mixing bowl is perfect for mixing large salads, kneading dough, or preparing family meals. 2.2QT glass salad bowl is perfect for mixing batters, marinating meats, or serving soups and side dishes.1.7/1.1/0.8QT glass bowls are ideal for portioning leftovers, whisking egg mixtures, handling small ingredients, or serving snacks and fruit. Space-Saving: Our glass nesting bowls and lids nest together for space-saving storage, keeping your kitchen organized. Each glass mixing bowl with lid comes with a food-grade bowls cover that locks in freshness . When storing leftovers, the bowl lid effectively prevents air from entering when storing leftovers! Whether cooking, baking, or storing, every dish finds its perfect home. Versatile Design: The wide-mouth opening perfectly accommodates salad tossing, dough kneading, meat marinating, or serving soups. The deep bowl structure effectively prevents spills, meeting diverse kitchen needs like baking, meal prep, and storage. A Thoughtful Gift That Blends Practicality With Style:This glass bowls with lids set of containers is not only a functional choice but also a thoughtful gesture for any occasion. An ideal gift for Mother's Day, Christmas, birthdays, weddings, housewarming parties, and other social occasions, it is equally suitable for casual gatherings and family dinners. Note: The bowl lid features a snap-on design，press down during use to ensure a secure fit over the bowl.