I love jelly and so do my kids. Usually when I make Jelly I use glass cups to put it individually but this last week I started using the plastic yoghurt cups. Although they end up in the recycle bin after a while, at least they are reused one or two times.
Plastic yoghurt cups can also be used for pudding or mouse. It might not be attractive when we have guests but it works fine for us and it is a way to show the kids that we can reuse simple things, we just have to think what we can do with them.