Bentgo Prep snack containers make snack prep easy with 10 trays and 10 custom-fit lids that stack together to save space. Never worry about measuring your food when packing your snacks as the volume is embossed right inside the tray. The clean, modern design features a ribbed lid that makes it easy to open and close. Each food prep container can be reused up to 10 times and is safe to pop in the microwave (tray only) or store in the freezer. Bentgo Prep is made with food-grade materials that contain no BPA, PVC, phthalates, lead, or vinyl.