Phonons. Phonon pipelines, phonon tanks... Investors please form an orderly line for me to fleece you go millions. Srsly though. Liquids are extremely good at

Phonons. Phonon pipelines, phonon tanks... Investors please form an orderly line for me to fleece you go millions. Srsly though. Liquids are extremely good at this kind of density storage trade off, it's the reason petroleum won over electric cars in 1900 ( look it up, electric cars aren't new, we just decided about a. Hundred years ago we liked oil more.)