Cup That Holds Water but Can’t Hold Mercury Interesting look at a lead cup that can old water but is porous to mercury. This reminds me of the Superfluid Helium: Facebook Prev Article Next Article Experiments Checkout these cool gadgets... Related Posts Splitting 10 Decks of Playing Cards with Hydraulic Press 10 Random Liquid Nitrogen Experiments Water Droplets Orbiting Needle In Zero Gravity Ever Seen A Slinky Drop In Slow Motion? Fire From Anti-Freeze? Cool Experiment Demonstration of a Gyro Wheel