These do exactly what I want - hold a tablespoon or a bit more of a powdered supplement I mix up. The lids stay on very well and no powder leaks. The 5 star rating is provisional though because when delivered it is damn near impossible to get the lids on. Somebody posted about using hot water to loosen them up and help them fit. I filled up a tupperware container with water as hoot as it could come out of the faucet and let the containers and lids sit in the water for 15 minutes. I then pulled them out, put the lids on, which was not difficult and let them set for a few days. It might have taken less time but I didn't need them right away. That seems to have been a permanent fix and was easy enough to do.