It’s just a giant version of “the drawer”.
Every single Allen key from every single piece of Ikea furniture ever purchased.
Ildar Sagdejev / Via commons.wikimedia.org
Tubes of superglue where the glue has stuck the lid shut.
Omegatron/Wikimedia Commons / Via commons.wikimedia.org
Random pieces of wood in various sizes.
Jstapko/Wikimedia Commons / Via commons.wikimedia.org
A string of broken Christmas lights from the year your dad got really ambitious with the decorations.
libra500 / Via ebay.co.uk