Step-by-Step Instructions
1. Take the plastic bottle and remove the cap.
2. Using the scissors, carefully cut a small hole in the center of the bottle cap that is slightly smaller than the diameter of your tubing.
3. Insert one end of the rubber or plastic tubing into the hole you just made in the cap. Ensure it fits snugly to prevent air leaks.
4. Secure the tubing in place using hot glue around the hole. Allow it to dry completely.
5. If desired, you can wrap duct tape around the base of the tubing for extra stability.
6. Take a balloon or rubber gasket and place it over the opening of the bottle where the cap screws on. This will act as a one-way valve.
7. Screw the cap back onto the bottle, ensuring that the tubing is still in place and the balloon is sealed.
8. To use the pump, squeeze the bottle to push air through the tubing and into your desired item. Release to draw air back into the bottle.