So the prank is this:
1. Victim takes a plastic cup.
2. Victim puts water in it.
3. All the water spills out from a hole in the bottom of the cup!!!
Step 1: Materials/Making the Prank
A plastic cup
Hands (At least one!)
A working brain
Optional: Camera to tape prank
To make the prank is pretty simple........
All you do is cut a hole at the bottom of the cup and that's it!
Also, try not to bend the cup so it looks like it's never been used.