Available from early October, the £1.29 price-marked 500ml cans will be available in Blue Raz and Hardcore Apple flavours.

The brand said the variant is “tapping into growing consumer interest in energy with additional functional benefits”

It said the “performance” is delivered by 200mg of caffeine per can, paired with acids which “help fuel protein synthesis and muscle recovery”.

Adrian Troy, Barr Soft Drinks marketing director, said: “Sports and energy is growing at 8.6% which is significantly more than total soft drinks.

“This growth is being driven by big can energy which is growing at more than double the rate of mainstream energy, making it a key category for retailers.

“This new product offers a different proposition to current energy products and will appeal to the 61% of men in the UK aged 16-to-34, who use supplements.

“In addition, low calorie energy is in strong double-digit growth, so we are confident that Rockstar XD Power will deliver incremental category growth for retailers.”