This feature is a little off from normal storage devices, but we like the simplicity of construction, and it's ability to be stored in a compacted area.

Piccolo Table

This table by nobody and co is made of steel and teak wood, and can extend to twice it's length by separating the staves. Or it, and it's accompanying bench, can be stored or used in half the space by pushing it back together.

The concept is very simple, but it allows additional versatility over standard tables. It's not suited for every situation, but it might work out great for other multi-use areas.