These glass meal prep containers are made from borosilicate glass, they are dishwasher, freezer, microwave and oven safe glass food storage containers. Each glass storage containers contains a locking lid with silicon gasket to keep the food clean and fresh for a longer time. You can use these airtight glass food storage containers with lids for weekly meal prepping and storing leftovers. They are excellent glass lunch containers, helping you enjoy healthy and hearty food when at work or school. The food storage containers with compartments are perfect for portion control, especially if you have the meal plans. These glass kitchen containers with lids are stackable to save space . Glass clear containers will not absorb odors, and are easy to clean.