I've been into these old Ball jars lately. I've made terrariums in some of them. This one I'm using for my simple syrup. I feel like one of the Baldwin sisters on The Waltons sharing "the recipe."
So here's my recipe for simple syrup:
Add equal parts sugar and water in a pan and heat until boiling. For the batch shown I used four cups of sugar and four cups of water. Some people will add more water, but I think the point of this stuff is to be super sweet, and it's not like you can't just add some extra water or soda when you make the actual drink. That's it. I've heard stories of people screwing this up. I can't figure out how you could mess up simple syrup.