This Ashtray/Coin Holder is a little known Genuine Land Rover option for the Defender.
Even if you don't smoke it provides a handy storage bin for coins and similar small items.

The Defender Ashtray/Coin Holder is designed to fit into the cup holders within the Defender cubby box. Land Rover uses a Ford Ashtray which require an insert to create a snug fit within the Cubby Box cup holder. The insert is supplied with all Ashtray/Coin Holders.

The Ashtray will snugly fit cup holders measuring 66mm at their widest point.