So I decided to try it for myself. The items you need are vinegar, lemon peels or orange peels and some sort of pan to freeze them in. These are the items I used.
This is the pan I used. It's one of those mini muffin pans. I started by placing chopped pieces of the orange and lemon peel in each muffin.
After you fill the pan, pour vinegar to the rim of the muffin pan. Place in freezer overnight, then in the morning pop them out. I just used a warm butter knife, and they popped out very easily.
This is the finished product! Easy and simple and they smell so good!!!