I like these disposable bags for many different projects. I actually originally bought them to decorate my daughters 2nd birthday cake, however, I ended up using them for another reason. I have my one handmade soap business and I love to use these to decorate some of my soap tops. Since they are made for piping the tops of cakes they work pretty much the same for decorating soap tops. I do not save them since I do not decorate my soap tops often enough to have to reuse these. And since they are disposable I am not sure if it would be safe to reuse them anyhow. If you do not know how to use these they can be hard to get used to especially since they do not stretch. It can be a little difficult to get them to open enough to force what you are putting in far enough down without making a mess. I would suggest finding the right size cup to stick these in to keep them open so you can fill them. They work great and considering they are disposable they are pretty durable and strong.