Ecolunchbox Seal Cup Trio – 3-Piece Leak-Proof Stainless Steel Set, 40 oz | 3-piece nesting set; leak-proof silicone lids; 100% plastic-free; dishwasher & oven safe; 40 oz total

Yes, these are it! These really are leakproof!!! Filled one with water and shook several times and not a drop came out. Nicely lightweight - about the weight of store-brand tupperware containers. Had bought two other varieties of SS containers and both had raw exposed edges and these ones have nice, rolled edges with no raw material showing through. Excellent design and I feel safe to store my toddler's food in them. Edit: Have used these almost daily for the last few weeks and so far no complaints. They indeed are leakproof. Noticed a metallic taste to greek yogurt after storing for maybe two hours, but perhaps that is to be expected given that acidic foods will acquire a metallic taste from stainless steel. Edit 2: Now almost a year after purchasing and daily use, I have not had the metallic taste reoccur after that first time, despite still storing frozen blueberries or raspberries with yogurt all the time (a rather acidic mixture). My toddler has dropped these many times and they are still perfectly dent-less. And I've never had a leak. I am now buying a second set because we use these so much. I have also become much more savvy about SS products, and love that these are a very high grade of stainless steel (i.e. will not rust).

These are great! I wish the seal was better.

These are seriously the BEST containers I have ever used. I love that the lids are silicone, not plastic. I avoid plastic when it comes to food, but I also like the silicone because it you pack slightly more than the size of the containers, the lid will still conform to the containers, with just a small bump across the top. These containers are leakproof as advertised. I have ran them through my dishwasher several times and I have had no issues. I have not used any of the pieces in the oven so I can't say anything about that part. The containers are spacious. If you see the picture grid I added, you can see that the smallest container easily holds the segments of THREE Mandarin oranges with room to spare. If you look closely at the picture grid, you can see that I slightly overfilled the medium container and you can see what I mean about the silicone lid conforming to the shape. In the picture grid, I sliced an entire Bell pepper into the largest container, and there is room to spare! These containers hold a lot and I continue to be impressed with them. I have used other products by this company and so far, this is definitely my favorite. I received a free set in exchange for my honest opinion about it.

These are a game changer. I bought these primarily for my toddler for packing snacks on the go easily. These delivered in spades-pack fruit easily, can use muffin liners to divide and bento style one. These delivered most convenient parts: they nest stack for storing saving space, they are superb for traveling in car/plane/train/etc. I almost never leave the house without one of these with a snack for my kiddo or an empty one for easily packing leftovers to take back home. Please don’t stop making these! My only wish is they came with clear lids but either way I love these and we have 2 sets!

These containers are perfect for my 5 year old's school lunch. The lids are easy for her to take off and put back on by herself (the lids on many of the other leakproof containers are too hard for young kids to use by themselves). I haven't used them for anything super liquidy (mainly Greek yogurt, berries, cut pineapple, and sandwiches), but we've never had any leaks. I did fill them with water to see if they leaked (they didn't). They didn't even leak when the lid wasn't completely pushed all the way down. To be honest, I haven't used the medium or large containers yet. Since my daughter is only 5 and doesn't eat that much, the small size works best. I'm sure we'll use the other containers when she's older and eats more. I do wish they offered the multi size set in rectangle shaped containers instead of round. The rectangle shape fits better in lunch boxes when you're also trying to fit a water bottle and possibly a second container.

These containers replace plastic one I have used for a long time. I chose them because, unlike glass containers, they are lightweight and the covers are easy to open and close. Those are important features as I get older. Other than not being transparent, the only problem I have encountered is a persistent gray film that doesn't come off with hand washing or vigorous wiping. After googling it, it seems that this is a common problem with new stainless. One suggestion is to wipe with olive oil, then wash. This appeared to help a bit. p.s. These containers stack beautifully and take up very little space. I ended up buying multiple sets, and the mini, extra large and jumbo sizes.

I'm on a mission to reduce the amount of plastic in my body, my environment, and the world. These containers are an essential tool to accomplish that goal. They are simply wonderful! Light-weight, easy to clean, seal is pretty good (if you put it on right), look way better than Tupperware and such, cost way less than Ziploc bags (which I used to go through about 3 per day) in the long run. Just two things to keep in mind: they are not microwave-safe, and they don't keep the contents hot or cold. Logically that's what you'd expect.

I really like the containers by this brand, but why oh why do the stickers have to be a nightmare to remove

Seals everything well

Seriously over my expectations.. my container fall on the floor and lid stayed in place.. tight and sealed.. best buy and quality is life time 👍🏻