HexClad Mixing Bowls made from durable high quality stainless steel; These bowls feature a non slip silicone base, so they stay put as you prepare your food, mix, and blend even at an angle. HexClad Mixing Bowls come with patented individual vacuum seal lids to keep food fresh as the day you prepared them; The air tight storage is ideal for chilling, marinating while keeping food safe. HexClad patented vacuum seal lids include a date setting dial to help mark storage date and monitor food shelf life; Visible, see through lids take the guesswork out of leftovers and avoid food waste.