Lock&Lock Boroseal, Borosilicate 450-Milliliter Glass Square, 1.8-Cup Measures approximately 5.4 by 5.4 by 2.4 inches with 1.8-cup capacity Excellent airtightness with the 4-side locking system keeps food fresh Heat-resistant glass can withstand sudden change in temperature Resists stains and odors for lifetime of clarity Safe for use in microwave and oven (without lid), freezer, refrigerator, and dishwasher