SUMMER days may be behind us but even when it is cool outside we all need to stay hydrated for optimal health. We should aim for six to eight glasses a day. Water is the best choice as it is calorie and sugar-free.

So it’s good for waistlines, teeth and your pocket too, if from the tap. But if you’re bored of it, there are some great health drinks on the market. Today, I put some to the test .

. . Kombucha SOUTH London-based MOMO Kombucha has launched a watermelon version of the fermented tea drink.

It has combined its kombucha – which is full of naturally occurring probiotics – with water-melon sourced from an area in Italy renowned for melon growing, called Mantua. And it is stunning – sharp and crisp to begin with, leading to a sweet, fruity watermelon taste. It’s brewed the old-school way with water, kombucha, sugar, watermelon juice, organic tea and elderflower.

At 66kcal per 330ml bottle, RRP £4.50, it’s pricey but lovely. See momo-kombucha.

com . Juice IF you want something that is 100 per cent natural then you cannot go wrong with juiced vegetables and fruit, and Presscription is a great choice. Most read in Health Its juices are designed by nutritionists, using 100 per cent raw, fresh and unpasteurised fruit and veg.

It focuses on juice cleanses, which I can never stick to, but I love the company’s drinks, soups and shots for a bit of a health kick. The Green Vital is a vitamin-packed, detox- friendly mix of celery, broccoli, kale, lemon, spinach, par.