Artists used to paint with pig bladders.

In the past, before the invention of plastic containers, artists used pig bladders as makeshift containers for holding paint. These bladders were durable and flexible, allowing artists to mix and store their colors. Painters would puncture a hole in the bladder and squeeze out the paint as needed. While not a common practice today due to the availability of modern materials, the historical use of pig bladders in art showcases the resourcefulness and creativity of artists throughout different time periods.