XT-60 Silicon Lipo Cap Holder

I made this to keep track of what batteries I have used when flying model aircraft. The silicon caps can be purchased from a variety of places. There are also several printable options if your printer is capable of printing flexible materials.

The ones I use are from amazon:
https://www.amazon.com/Helicopter-Quadcopter-Controller-Discharged-Indicator/dp/B072KPGZ92/ref=sr_1_4?ie=UTF8&qid=1527367946&sr=8-4&keywords=lipo+battery+caps

I added velcro to the back of the holder so that it stays