Operating like the organized system of shopping carts found at most grocery stores and large retail outlets, the Share chairs by Thomas Bernstrand are mobile public chairs that encourage users to keep spaces organized by chaining the chairs back up whenever they're not used.
The Share chairs are attached to a immovable base and connected to each other via a coin-operated chain-locking mechanism. When a user inserts a coin, a chair is released from the chain in front of it, and the coin is returned to the user when he or she puts the chair back.
Bernstrand was inspired by parks in Paris where, rather than fixed benches, there were chairs people could move freely but had to be moved and collected in order to allow the park maintenance to cut the grass. As the designer states, "Share chairs provide more flexibility than fixed seating, as they can be positioned to face the sun, enjoy the shade, or take advantage of the view."