How To: Pull off a great prank with a styrofoam cup and a straw

This prank is simple, creative, easy to set up, messy and embarrassing. Five of the first things that we at Wonderhowto look for in a prank. All you need are some basic household materials:

vaseline
Styrofoam cup
straw
lid
drink
pen
sharp knife

use the pen to mark off the center cap on the bottom of the cup, then cut it out with the knife. Insert the straw, and seal the inside of the hole with vaseline. fill the cup with drink, position the lid, and wait. It's glorious.