>Water is heavy - 1 Kg for 10cm^3
Ah but what if it's heavy water ? Then it's 1.1 g mL−1. Throw in some uranium 235 and you've got a fantastic self sustaining "extra hot wash" cycle, note this model is only for those with deep pockets and lots of spare lead lying around. With that D2O it can also handily double as a H1 NMR*
*Super conducting magnets and RF generator not included and sold separately.