Two types of custom PCBs were created for the cylindrical keyboard, which acts as a sort of extra-functional drink koozie (minus the insulating capabilities). There are 12 longer strips that the actual keys attach to, and a hexagonal base where you’ll find a ATmega32U4-AU microcontroller that makes the whole thing work. Google has no intentions of mass producing and selling this creation, but it has made the firmware, build instructions, and other plans available for download on GitHub for anyone who wants to go to the trouble of making their own.
Given it was created by Google Japan, the Gboard Yunomi features keys with Japanese characters on it, but customizing it to other alphabets should be relatively easy. The hard part is learning to effectively type on this thing. Even if you’re able to more or less preserve the QWERTY layout, wrapping your brain around how to type with all the keys positioned vertically will be challenge. If you’re so worried about spilling, might I suggest wearing one of those Camelbak hydration packs and sipping your morning coffee or afternoon tea through a straw.