I had gotten one, liked it so much that I bought a set, super great containersI purchased these over a year ago, and they are still my favorite tupperware to use.They seal air-tight, and they don't leak at all (I've even filled them with water to test).These containers are extremely easy to clean. I meal-prepped pasta w/ marinara sauce. They are still perfectly clear and look new - none of the orangey-red stains left behind by the tomato sauce.I've used them in the microwave, and the vent on top allows you to keep the lid on while it cooks and not have to worry about unleashing a wave of heat once you finally take off the lid.Will buy more, and will continue to look for different sizes to accommodate my different meal-prepping needs.I already had a couple of larger ones for the last 5 years, so I knew I would love these too. They are the perfect size. Close so well. Can use for freezing without worrying about the lids breaking off. Love the shape. Makes sense for space saving. They are plenty big to use for lots of things, but still perfect for our rv frig.We meal prep alot and these containers are a life changer. They're well built and super sturdy. The lid vent is a plus which helps steam the food for reheating. Not only are the rectangular shapes better for storing in the cabinets, they just stack better as well compared to round ones. We certainly recommend if you were looking to get some fairly large containers.I really love all these containers. I’ve been using them for years and since I started using them more in the freezer, I needed to order more recently. The square shape is PERFECT in the refridgerator or freezer and the simplicity of only three sizes for lids (orange, smaller blue, smaller yet green) is wonderful. They stack well in the cubbard and in the fridge.This particular size is the medium one. I use it whenever the leftovers are more extensive than most. Or to freeze larger portions. I stack them along with the small orange size.LOVE IT.Very grateful that I can still find the storage containers. I’ve been using them for years and as they wear out, I am thrilled to be able to find them on Amazon and replace as I need. They Stockwell, or color-coded, so you never need to look for the right top!Great containers. They are easy to seal, easy to wash and hold a good amount of food. So far pasta sauce hasn’t stained them. I cant attest to leak proof as the containers have gone from kitchen counter to refrigerator only. I’d buy them again.I store everything in these from fruits and salad fixings to leftovers. They keep things fresh, are microwaveable, and can be kept in the freezer.