These are Wonderful Air Tight Containers that are Very Pretty & Stylish as well.I am just beginning to use them but from what I see you just need to leave enough space when filling the Con'ts from the Top So the Cover Can Make an Air Tight Seal by Following these instructions, I haven't encountered any issues at All.I've Now Had my Containers for Three Wks & they are Still Working Properly W/0 any Issues.I Definitely Recommend This Product So Much So... I Already Purchased A Second Set...W/0 Receiving Any Free Items From the Company...So Yes This is a Real Honest Review!It’s very easy to remove and or put the lid on with the little lever action. It’s very easy to clean. I don’t especially care for the color I got, but that was the only option available at the time.I just purchased my 3rd set of these air tight containers. Everything stays fresh and they look tidy in my cabinets. I love that the contents are easy to see and you always know the lid is on tight. Just what I needed!These large containers do not hold a bag of flour or sugar. That is disappointing. Overall they seem durable and airtight.Económico duradero me encanto lo volvería a comprarThis is one of those truly life-changing products for me. I have always liked the look and convenience of taking a food item out of its original packaging and putting it into a nice container with a beautiful label. However, finding the right food storage container is hit-or-miss. I had previously bought what I thought was a nice set from Chef's Path, but those little flaps around the sides kept popping up and my rice cakes were chewy in no time.I had not heard of this sort of locking food container and now I will never purchase anything else. In fact, I was so impressed with this set that I immediately purchased three more sets in which to put the remainder of everything in my pantry. This particular set is perfect because I have bags in my pantry of varying sizes, and this set comes with different sizes that seemed to be customized to my quantities. They are quite sturdy -- as I was filling them I would knock them hard on the counter to settle the contents and put more, and they stood up very well. The top locking mechanism is top-notch. Put some food in there, lock it and shake it around as hard as you can. That top is NOT coming off. You do have to be mindful that the rubber gasket is set all the way in before you lock it; one time I locked it without paying attention and half of the top was a bit out of the container.The only thing I didn't really like was the included labels/pen. The labels are too small and they seemed to pop off after just a few days. Furthermore, the pen is not a nice, bright white but streaky, thin and unreliable. I thought I would be able to wash off what was written to put something else but the pen is permanent white ink. I got to work with my trusty Cricut and made beautiful, custom labels that are large and easy to read.Get this set if you have pantry envy! Having this one area of your life that is completely organized will make you want to organize other things, too!I liked the storage of dry ingredients to be displayed and stored.I recently started an organization kick and these were my first purchase. Needless to say, I will be purchasing more. They are perfect for dry storage. I have even used them to store fruit in the fridge.They are nice thick plastic. My only wish is that they held more volume, but I’ll purchase more for that reason.Really like it. Thank youI really recommend you