Bon Chef 9317 Stainless Steel 3 Wall Cold Wave Bowl with Stacking Cover, 0.75 quart Capacity, 6-3/8" Diameter x 3-1/4" Height 3 wall cold wave miracle bowls Pre-freezing these bowls will keep your food cold for 8 hours at ambient temperature Outer air chamber prevents the bowl from sweating while keeping the inner chamber gel frozen Bowl comes with a stackable plastic cover 0.75 quart capacity