...which is closely related to the box phenomenon: I have a cat that currently spends the night in an IKEA basket (https://www.ikea.com/at/en/p/risatorp-basket-

...which is closely related to the box phenomenon: I have a cat that currently spends the night in an IKEA basket (https://www.ikea.com/at/en/p/risatorp-basket-white-90281618/ https://www.ikea.com/at/en/p/risatorp-basket-white-90281618/) that was actually meant for socks. At the beginning, some parts tend to stick out, but after a few hours, the "cat liquid" has filled the available space and forms an almost horizontal surface, similar to this image in the article https://assets.rbl.ms/845008/980x.jpg https://assets.rbl.ms/845008/980x.jpg .