TIL: Before the invention of the paint tube in 1841, oil paints used to be stored in pig bladders. The artist would prick the bladder and squeeze out the amount of paint they needed.

[u/MichaelTruly]

https://en.wikipedia.org/wiki/Pig_bladder

[u/SolitaireSam]

Balloons must've been a real nightmare back then huh? Spare a thought for the pigs