Identify a spot near the top of the gooseneck tubing to drill a hole. This hole will be used to thread the USB cable that powers the water pump. Ensure the hole is large enough to comfortably fit the USB cable, but not too large that the cable moves freely.

Depending on the length required, cut the USB cable. Keep in mind that the cable needs to reach from the pump, through the gooseneck tubing, and to the switch adapted button.

Take the cut end of the USB cable and thread it through the hole you drilled in the gooseneck tubing.

To secure the cable and prevent it from being pulled out of the gooseneck tubing, add a zip tie close to the end that's threaded through the hole. Make sure to tighten the zip tie enough to serve as a stopper.

Attach the water pump to the drinking tube. Ensure that the connection is tight and secure.  Use the ear bud from the stethoscope for this or an alternative. The pump should be positioned to allow for easy immersion in the water bottle and optimal water flow.

To prevent any movement or dislodging, add additional zip ties to secure the USB cable and the tube to each other and to the gooseneck tubing.

To ensure a solid connection in the upcoming steps, pre-solder the wires in the USB cable. Strip the ends of the wires, apply a small amount of solder to each one, and allow them to cool.

Once the pre-soldering is complete, twist together the black wires from the USB cable and the switch-adapted cable. Solder this connection for added strength and electrical continuity.

Repeat the above process, but this time attach the switch-adapted cable wires to the red wires from the USB cable. Remember to solder this connection as well.  See the wiring schematic for more information. 

To ensure the connections are safe and protected, cover them with electrical tape. This will also help to prevent any accidental short circuits or disconnections.

And that's it! You've successfully completed your switch-adapted water bottle. Now, when the button is pressed, the pump should move the water through the tubing, providing a simple and effective solution for independent drinking. Always remember to test the system in a safe environment before use. Enjoy your new DIY assistive device!