Beer Liquid is a resource obtainable by mixing water, 40 Thatch, and 50 Berries in a Beer Barrel for 6 hours (1 hour in singleplayer with "Use singleplayer settings" turn on and in mobile version). Beer liquid is used with a Water Jar to craft the Beer Jar inside the Beer Barrel.
The beer barrel must be irrigated, not just water put inside.
Beer Jars can be used to tame the Chalicotherium.
If spawned into inventory using console commands there is no way to remove it. An easy solution around this is to kill the player and recover the items minus the liquid.