This is a very funny prank, in which you can get revenge on April Fools, or any other day. The basic idea is this: you give your friend a water bottle. They try to open it, but it won't untwist. Once they try hard enough, the plastic will break and the water will be spilled all over them.
Step 1: Supplies
For this prank you need:
2 Water bottles that have bumps on them (like shown on the picture)
Something to cut a water bottle in half (like a utility knife)
Step 2: Make the Water Bottle
For this prank, you have to build your own water bottle, so that when your victim tries to open the water bottle, it will split in half. Take the labels off both of your bottles but save one for later. Now, cut the first bottle half way below the neck of the bottle so it is cut in two. Keep the top half. On the other one, cut around the third line from the top. You will keep the bottom half. Place a lighter below the top half so that the plastic melts inward. Now put grease around the edges of the top half and place the two halves together. Then, hot glue the lid on the bottle, so that it is impossible to open. Finally, put the label back by gluing it on with your hot glue gun.
Step 3: Give Your Water Bottle to the Victim
Now all you have to do is give your "water bottle" to the victim, and wait for the laughs.