can be bought in 2 packs at the dollar store... much cheaper...
Yes they are cheaper but how long do they keep foods fresh? Do you have to recover them in plastic wrap, foil or something else?
There are some reviewers who are saying they have had to tape the cover on to keep it sealed. If you have to add packaging to Glad's product, I am not sure how much better than they would be than your solution of the foil trays except they sound sturdier for reuse.