Lock&Lock Boroseal, Borosilicate Glass, 8-Piece Set/4-Containers Includes a LLG841 (3.1-cup / 6.6x6.6x2.8in), a LLG871 (5.4-cup / 7.9x7.9x3.1in), and 2 of LLG211 (1.8-cup / 5.4x5.4x2.4in) 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