I was tired of plastic bowls that fades with whatever color sauce was in them. These glass bowls wash in the dishwasher with lids on top rack very well. They seal okay. I wouldn't turn it upside down. I have frozen things in them. Over all I am happy with them. I only gave it good because I feel the lids could have better quality. Otherwise a good buy for the price and a space saver since they stack !
I ordered a set for me and another for my daughter as a gift. Unfortunately the set I opened for myself had a little chip in the largest of the bowls. Not worth sending back I checked the other set and it's fine. Got them just in time to take care of my Thanksgiving leftovers.