When I worked at Boeing, the coffee machine had a MIL SPEC taped to it that properly explained the procedure in making regulation milspec coffee. (Mil specs are analogous to a having a standard library of subroutines. Engineers don't have to re-invent how to lubricate a bearing or tighten a bolt or cad plate a part, they just specify the relevant mil spec.)
One of my first jobs included typesetting MSDSes¹ from a database. One of the things we had an MSDS for was water. ⸻ 1. Material Safety Data Sheet. These are most commonly provided for the assorted potentially hazardous chemicals in industrial use.
Even the relatively safe and stable liquid form can be deadly if drank in significant quantity or inhaled in even small quantities, and a person submerged in it for even a few minutes without special equipment is in a bad spot.