duschvorhang dihydrogenmonoxidWater. Without this refreshing liquid, we would look pretty old. In fact, we wouldn't look old at all, as we wouldn't exist without water. The same applies to plants, animals and everything else that creeps and flies. But water can not only keep us alive, it also makes us bloom anew every morning in the shower. The dihydrogen monoxide shower curtain shows everything you need to know about H2O next to a large water molecule: the atomic mass, density