- Empty Bottle
- Scroll of Teleport
- Buy a Teleport and an Empty Bottle.
- Go a little further away from the fountain.
- Use all the charges of your bottle.
- Now Teleport to your fountain.
- Use Rally-points/Waypoints function before you land to your fountain. [by Shift+Click the bottle to the fountain]
- You will have infinite bottle charges. Just point the target to your bottle to refill it.
credits for the video: badboy860000