Insulated foam containers keep your food at proper serving temperature, preserving flavor and texture. Solid, leak-resistant one-piece construction. Convenient foam containers are an excellent option for quick-service food establishments. For use with Dart® lids (sold separately). Extra Squat. Food Container Type: Base; Material(s): EPS - Expanded Polystyrene; Material Type: Foam; Interior Volume Capacity: 8 oz.