DIY air mattress inflation bag

[Johnny 5]

I ran across a video on how to make a DIY inflation bag for an air mattress using the cap of a common water bottle. I own a similar air mattress and was bored so I made one. I had all the tools and and parts I needed at the house. I modified the design in the video by adding an o-ring and reinforcing the dry bag with some round stick on patches I had. It works well as an inflation bag and I can still use it as a dry bag for my sleeping bag by replacing the drilled cap with a solid cap.