Our collection of bike bottles, camel bottles, and other water bottles was taking up too much space in the cupboard.

So I looked on Instructables for a water bottle rack, and found nothing that matched what I wanted, but I did find a wine rack:

https://www.instructables.com/id/How-to-Make-a-24-b...

that inspired me.

And I was off!

For this project you need:

A cardboard box deep enough that your bottles won't fall out, and big enough to hold them. This one was 14" x 16" x 8" (36cm x 41cm x 20cm)
Tape or other method of fastening cardboard together
Screws and anchors, or another method to fasten it to the wall

Step 1: Build Your Rack

Tape the bottom of your box, then cut the flaps off the top of the box. A good box has flaps about the same height as the depth of your box.

Take your flaps, or other cardboard that matches the sides of your box, overlap two of them on a diagonal, and tape them together.

Take the other two flaps, bend them to fit between the other diagonal and corner, and tape them down.

Step 2: Mount Your Rack

I used four flange screws, but fender washers would probably be a good idea to help spread the load, as cardboard is not the sturdiest material.

Install your center support, and fill it full of empty bottles. This project could be fancied up fairly easily, but this basic version is quick and effective.