They seem to work, but my god they are cheap.. Very flimsy, cheap-plastic feel. I see reviews about what a bargain they are but for 7 pound you can get much better quality. It is true that once you fill them they look a bit better. If you are considering them for a gift, do not buy them. The box and the first impression of them, is not something you want to give to someone. They will think you got them from PoundLand..