These are a nice replacement for the old ones that eventually tore. The fit is a bit tight, as they are more stiff than the old ones, but they work. Just takes a bit more effort to put on and remove. I received the wrong color initially but the seller was quick to fix the problem. Would recommend.I got these as replacement lids to the 3 cup rectangular glass containers. These lids are not a tight seal on the glass. It fits, but not super snuggly. I would not really feel confident if I had really liquidy foods in this and tilted it sideways in my backpack...If you replace your lid, you save money. The glass container is still good and with a new colorful lid, it's li's like brand new. I have bought from this company a few times, different sizes of lids and they always fit well. I really like the available colors. I think the charcoal is very smart looking. I've bought a variety of colers and they are all fun!These lids do not fit as secure as some others.These lids are just like the original ones that came with my pyrex. I'm a heavy user of these pyrex glass containers with these lids as I take dinner leftovers to work every day. They go from the freezer to the microwave to the dishwasher and repeat. They take a lot of abuse and hold up nicely. Over time (a few years) they do wear out and can crack. But overall they are well worth it and I will continue to use these as they are truly the best thing on the market that I can find.Glad this was available. I can once again use my 3-cup Pyrex rectangular containers! Happy the delivery was prompt, too.I love my Pyrex containers but the lids get destroyed. This replacement lid fit perfectly and I’m already using it.perfect fitDisappointing. Even though they say Pyrex these lids are nothing like the original thing. Fit is ok but plastic is hard so doesn’t make a good seal or sit flat against the glass.QUEDARON PERFECTAS, MUY BUENA CALIDAD, AJUSTAN PERFECTAMENTE.Volví a utilizar los refractarios.Great fitWorks