HOMBERKING glass containers are made of high quality borosilicate glass, which can be used for storage, cooking and microwaving. 8 Pieces Glass Food Storage Containers with Lids (8 lids & 8 Containers) 8 pack size: 8.1(inch)x6.1(inch)x2.8(inch) Capacity: 1040ml (36oz) - 4.4 cups Wrok Temperature Our containers withstand from -4? – 752? (-20? – 400?). Safe material: Borosilicate Glass BPA-Free Snap Locking Lids Component: The main body of the container - Transparent borosilicate Glass The lid of the container - BPA-Free plastic Snap Locking Lids & Pink silicone sealing strip. Tips: 1. In order to prevent the rubber seal strips sticking to the glass containers, please make sure wash and wipe dry the lids and glass containers before put them away. 2. It is safe to wash the lids in the dishwasher, but high temperatures over a long period of time can deform the rubber seal strips at the edge of the lids. In order to extend service life of rubber seal strips, please wash the lids by hands as much as possible. 3. If you have any questions, please feel free to contact us.We'll get back to you in 24 hours.