Buy it once and have them forever!  These wonderful airtight glass food storage containers feature leakproof lids with vents! 16 total pieces (8 blue lids + 8 containers).  Made from borosilicate glass.  Very durable.  The package weighs over 8 pounds!  That tells you these aren't chintzy junk; nice quality! Lids are food-grade plastic, so they won't leach harmful chemicals into your leftovers. You are getting the set with the blue-colored lids.  

Real review from an actual purchaser: "Fantastic storage containers! Great for leftovers! The Lids stay on real tight! A very strong hold. The price is right $$ purchase several! Make A Fabulous Gift for anyone,"