Friends that constantly forget chip denominations can ruin a game of poker.

Stick your chips into the clear perplex Chip Tree and they’ll never have an excuse to ask how much the red is worth again.

However, if you’re playing with people that aren’t rank beginners, have a rudimentary level of numeracy and don’t suffer from colour blindness then you should be able to survive without this bastard lovechild of Connect Four and a dodgy takeaway menu.

One invention that definitely wouldn’t come out of the Dragons’ Den in one piece.