Pyrex 7200-NLC Blue No-Leak Vented Round Storage Lid Cover for 2 Cup Bowl Rubber Gasket Ensures an Airtight Seal During Food Storage Top-Mounted Vent Allows for More Efficient Heating in the Microwave Fridge, Freezer, and Microwave safe (Do not use in oven) 100% BPA-free plastic cover is dishwasher safe (top rack only) Non-porous surface does not absorb food odors, flavors or stains