Firestar Energy Booster has been launched as an alternative to Red Bull and other energy drinks. The product is a small sachet of sherbet crystals that consumers eat - and requires no water or chilling.

The company behind the new product, Firestar Energy, says the sachet has more caffeine than most energy drinks and lasts for up to four hours.

In addition, it uses a special time-release technology which means there are "no peaks and crashes".

It says it is proving popular because it’s low in calories but is also convenient and discreet due to its small packaging. In fact, it can fit in a wallet or purse.

Each sachet has a rrp of £1.50 and the company says it offers great margins to retailers.

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