You can boil liquid with your bare hand! Hand Boilers are looped and twisted glass sculptures containing liquid that will boil as heat is transferred from your bare hand. Fascinating and pretty!
 
Popular as a collector's item or as a souvenir, hand boilers demonstrate the science of temperature and gas pressure change. But, really, they are just plain fun! This small version packs a ton of fun into a mini science toy. Comes in a variety of colors. Glass - very fragile! Not for young children.
 
Price is for a single item. Multiple items are shown. Each sold separately. Colors and styles will be picked at random.