Lock&Lock Boroseal II, Borosilicate Glass Round, 8-Piece Set/4-Containers Includes a LLG821(1.6-cup/6.3 x 4.6 x 2.4in), a LLG861(4.1-cup/7.1 x 7.1 x 3.2in), and 2 of LLG831(2.8-cup/6.1 x 6.1 x 3in) 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