Leak-Proof Design: Rubbermaid Brilliance Glass Food Storage Containers feature crystal-clear lids that are 100% airtight and leak-proof, ensuring no spills or leaks. Microwave Safe: The vented, microwave-safe lids allow for easy, splatter-resistant reheating without removing the lid. Space-Saving: These containers have a modular design, perfect for stacking and organizing in your fridge or cabinet. Oven-Safe Glass: The glass bases are oven-safe up to 450 degrees F, making them versatile for cooking and serving. Easy Maintenance: BPA-free, dishwasher-safe (top rack for lids), microwave-safe for reheating with lids unlatched, and freezer-safe for convenience. Universal Lids: The smart lid system features universal lids that fit across all Brilliance containers, regardless of material type. Complete Set: Includes two 3.2-cup glass containers with lids, totaling 4 pieces for versatile storage options.