Many of us have fat days, ugly days or just generally feel like we've lost our mojo, which often leads to a huge slab of chocolate cake, several gallons of tea or both. Thank goodness then for Delo (pronounced ‘de l'eau') water booster caps which are made of 100% natural herb essences and are available in five different mood-altering formulae; Energy, Sexy, Sun, De-Stress and Slim. Simply screw on a cap of your choice on to a French half-litre bottle of water such as Evian or Vital or on to the specially designed ‘Delo Shaker-Bottle' and watch the herbs infuse the water, then drink, safe in the knowledge that you'll feel better without ruining your diet.

£8 for a pack of four or £9.50 for The Discovery Pack, available from Selfridges and drinkdelo.wordpress.com