How to Melt Polystyrene Cups. These festive little polystyrene cups are so fun to watch them shrink! Not all science requires expensive and hard to find chemicals or fancy laboratories. You can explore the fun of science in your own kitchen. Click Here to Subscribe to HooplaKidzLab: http://www.youtube.com/subscription_center?add_user=hooplakidzlab Please leave your comments in the comments section. Your feedback will be appreciated. Thanks for watching!! Like ! Share ! Comment ! Subscribe !