Consider Chool from the London based design company Slam – a chair and a stool in one clever item. In its stool version, it can be pushed under the table or stored in a closet, taking very little space. But when the extra sitting is needed, Chool becomes a chair. The weight of your bum is all that is needed for the transformation to occur. The piece can also be locked in any position between chair to stool at the push of a button. Chool is fully customizable with different upholstery choices and finishes. Color combinations are plentiful. And if you happen to have an outlandish design idea that is not represented in the line, the kind people at Slam will make an effort to implement it.