First, I am being asked to provide a review before I have used the bags enough to have a solid opinion. In effect, they are excellent with a couple of "buts." They are difficult to transition to because it takes a while to get used to putting food items in a purse (looks like a purse!). Second, I find that I need bigger bags than I thought I would. So, maybe place photographs of a filled cup for each item or something that instructs customers. Also, give customers a suggestion how to best air dry the bags after they come out of the ecologically-minded dishwasher. In addition, even though they do NOT spill, it's strange to put them on the side in the refrigerator. Maybe some of the smaller ones also need to be able to stand up. I am very excited that I will be using them for sous vide!