Plastic sandwich box with non-skid bottom. Freezer safe, leak-proof, and microwavable (Caution: Lid is airtight. When microwaving, remove lid or loosen lid sufficiently to let steam escape). Dishwasher safe (top rack). Great for snacks and lunches.
Approximate dimensions: 5.5" long" x 5.5" wide x 2.25" high.