I actually did this once when first dating my now wife. I left a shopping list very similar to this: - Cucumber - Aubergine - Cling film - Golden Syrup - Candles - Clothes pegs - KY - Belts - Ping Pong bats/paddles - Wax hair remover - AA batteries x 24 - Rubber gloves - Whisk - Baby Oil - Goggles I then left it on the trolley for the next person