To make the lemonade, mix the lemon and lime juice, raspberry syrup and caster sugar in a jug. Stir to dissolve the sugar. Add 575ml/1 pint water and plenty of ice.

It wasn't nearly as refreshing as we'd hoped and tasted a lot more like sugary juices or even soda than lemonade. It costs around $1.50 for a 1-gallon jug, which is half the cost of some other ...