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 Potato guns are cool. Transarent potato guns are awesome Amazing Self-fuelled Liquid Metal Motor Does Water Drain In Different Direction Below The Equator? Exploding Ball Bearings in Slow-mo Which Duct Tape Brand Is Better? Magnet Gate Magnetic Wave Accelerator