LEAK-PROOF AND AIRTIGHT: Rubbermaid Brilliance Glass Food Storage Containers have crystal-clear lids that are 100% airtight and leak-proof, plus odor and stain resistant EASY STORAGE AND REHEATING: Glass containers have vented, microwave-safe lids for easy, splatter-resistant microwaving SPACE SAVING: Space-saving, modular Rubbermaid containers are perfect for stacking and organization OVEN-SAFE: Glass bases are oven-safe up to 450 degrees F, so they double as glass cookware and serveware EASY TO USE: BPA-free, dishwasher-safe (use top rack for lids), microwave-safe for reheating only with lids unlatched, and freezer-safe