Great product, sealing mechanism may be a slight drawback

I purchased 2 of these, they are not stackable. The seal is vacuum based and is quite strong, to the extent that the lid is difficult to remove at times. Although the lid did come off in my bag and the tub leaked on one occasion, possibly because it was upside down and the contents may have pushed open the vacuum plug, and/or the contents heated up and expanded. Also some quinoa grains got lodged in the vacuum plug (again upside down) which was slightly tricky to clean. The vacuum mechanism seems fiddly to me. Otherwise the versatility with the dishwasher, microwave and oven is great. If kept upright and cool, it's a winner. Stackable would be a bonus.

Excellent safe and quality product

Outstanding product, a stainless steel lunchbox that can also go in the microwave! leak proof, good size, well worth the money. It can be hard to open the lid as it is so leakproof, so maybe for older children, not small children, For adults, no problem