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Lock & Lock BOROSEAL, Borosilicate Glass, 10-Piece Set/5-Containers
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Learn more about Lock & Lock BOROSEAL, Borosilicate Glass, 10-Piece Set/5-Containers:

Mfg Part#: LLG421S5
Sku: 224142563
UPC: 886865421101
UPC 14: 00886865421101
Package Weight: 8.35 lbs
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The Lock & Lock BOROSEAL 10-Piece Set/5-Containers

Heat-resistant glass and normal glass are different! Lock & Lock uses the best materials including borosilicate glass.

Difference in raw material
Lock & Lock glassware is made of borosilicate glass which withstands high heat and sudden cooling, which allows you to use it safely in the oven, micro-wave and dishwasher.

Difference in manufacturing process
Heat-resistant glass is produced at temperatures above 2700°F, which makes it harder to manufacture. Lock & Lock glassware also contains borosilicate, which makes it capable of withstanding sudden change in temperature.

View this video to see how borosilicate glass differs from glass made from soda lime (the typical glassware you find in the US).

Difference in use
Heat-resistant glass can withstand sudden change in temperature, thus it could be used not only in a refrigerator, a microwave and a dishwasher but also in a 750°F conventional oven.

Safer with 100% heat-resistant glass
Normal glass or tempered glass may, with small scratches, shatter when there is a thermal or physical shock. LOCK&LOCK BOROSEAL uses Heat-resistant glass providing improved safety and durability in its glassware.


Part No. QuantityCapacity Dimensions
LLG421 2EA1.5 Cup/12.2Fl. Oz6.1 x 4.4 x 2.3in
LLG431 1EA3.1 Cup/25.4Fl. Oz7.3 x 5.2 x 2.7in
LLG441 1EA3.7 Cup/30.4Fl. Oz8.2 x 5.5 x 2.8in
LLG451 1EA7 Cup/57.5Fl. Oz9.2 x 6.6 x 3.3in
Total 10-Piece Set/5-Containers

Features :

  • Excellent airtight seal with the 4-side locking system
  • Cooking in oven, or use it as bake ware (without lid)
  • Salt and oxidation resistant
  • Microwave safe! (Without lid)
  • From oven to table at once
  • Freezer to microwave at once
  • Stain and odor resistant
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