Flrt has expanded its zero-sugar energy drink range with the launch of Apple Bottoms Up, its first new flavour since the brand debuted earlier this year.

The limited-edition seasonal variety features a green apple flavour with a slightly tart finish. It joins Flrt's existing Strawberry Fling, Berry Tempting, Guava Lava and Sunset Squeeze flavours.

Like the rest of the range, Apple Bottoms Up contains a blend of functional ingredients and botanical extracts, including green tea, guayusa and ginseng, alongside 200mg of caffeine per can.

The formulation also contains biotin, zinc and vitamins A, B and C, which the brand said are included to support collagen production and immunity.

Allison Erfort, vice president of Flrt, said: "We love creating flavours with a little personality, and Apple Bottoms Up has plenty of it. It's crisp, juicy, a little cheeky and the perfect seasonal fling for the Flrt line-up. This is our first flavour drop since launch, but it won't be our last. We're having a lot of fun building this brand, and there's plenty more to flirt with."

Apple Bottoms Up is initially available through a two-week preview at Kroger in the US. From 1 September, it will roll out nationwide at Walmart, Albertsons, Hy-Vee, H-E-B and Meijer, as well as through Amazon.

The drink is available in 12oz cans, with 12-can multipacks also offered through Amazon.