In hopes of saving some $$$ this year, we're thinking of making gifts for family. I'd love to do something canned (like, with Mason Jars) and buy some cute labels from the site listed below. Does anyone have any good ideas for Canned gifts?? And, say I wanted to make something like tomato sauce - would I have to do anything special to the can (like boil it) or do I have to be careful with ingredients like garlic (I seem to recall some connection with the possibility of botulism)???