Here's how to make your own.
- Measure an inch and a half from the base of the water bottle, and mark with a pen. Use a sharp scissors to cut away the bottom from the bottle. Do the same with another empty plastic bottle.
- Select a zipper that wraps around the bottle comfortably. We found a seven-inch zipper fits perfectly with an 18- or 20-ounce bottle. Secure the zipper to the inside of one bottle with hot glue. Create small lines of glue and press quickly while hot for best results.
- Open the zipper, and attach the top just like you did the bottom.
- Zip the container together, and you're ready to store your stuff!