Looking for a way to get rid of overstaying dinner guests without resorting to rudeness? Leave the vacuum in the cupboard and get down to Luna and Curious in Shoreditch, where they sell a product that will have guests rushing to the coat stand: musical wine glasses.

The crystal glasses have etchings on their side which, when filled with wine to that point, produce different musical notes when drinkers run their fingers around the lip. L&C suggests you buy 12 to "start the orchestra", but at £30 for two, it might just be better to just throw on your dressing gown, stand at the door winding your alarm clock, before offering to order everyone a taxi.