When the time comes to store food or to take it on the go, Pyrex users reach for 7210-PC blue rectangle lids. These durable, BPA-free plastic lids fit the Pyrex 3-cup rectangular glass dish (sold separately). PLEASE CHECK YOUR DISH FOR THE NUMBER 7210 ON BOTTOM TO ENSURE PROPER FIT. These lids offer a better, more environmentally-friendly storage solution than plastic wrap or aluminum foil, because they do not sag, rip, or slide off your dish until you remove them-and they can be used over and over! These lids are safe for use in the fridge, microwave, and the top rack of the dishwasher, so users can clean them easily.