Lock&Lock Boroseal, Borosilicate 620-Milliliter Glass Square, 2-1/2-Cup Measures approximately 6.2 by 6.2 by 2.4 inches with 2.5-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