Review on Nuburi Zipper by The Yard - Create Your Own Zipper with 10 Yards and 40 Colorful Pulls by Kristen Reid

I like these. This is definitely the most versatile and economical way to buy zippers if you don't need a lot of different ones. You can put two zippers on the same strip in the same direction or so that they face each other with a hole in between. It is convenient for bags. You can also make them opposite each other with a closed part in between, but in this case it will be very difficult to put on a second zipper, since you have to put it on the tape with a small end first. You can't close your back to hide your teeth. The zippers feel very light and not very strong, but I've endured significant abuse while trying all of these alignments. Still good.