Eco Friendly & Insulated Bamboo Lids. These food storage containers come as a set of 4 in following sizes; 0.0977 gallons | 370 ml 0.1690 gallons | 640 ml 0.2747 gallons | 1040 ml 0.4015 gallons | 1520 ml They are crafted from Borosilicate Glass & don't leach and chemicals The lids consist of sustainable bamboo