The Heineken family has acquired a minority stake in Double Dutch, the UK premium tonic and mixer brand.

The investment of just under 10%, provides new capital for Double Dutch, the brand owned by Dutch twin sisters Raissa and Joyce de Haas.

In addition, Michel de Carvalho, husband of Charlene Carvalho-Heineken, has joined the supervisory board of Double Dutch.

He said: “This is our first family venture into tonics and Double Dutch is an exciting brand with two driven, ambitious young Dutch women entrepreneurs behind it. No longer a startup brand, it has captured an 8% market share in the UK, which is testament to the founders’ hard work and tenacity. I see the growth in premium tonics continuing, with the demand for luxury soft drinks, healthier low sugar alternatives and unique mixers for exclusive variants of gin and vodka increasing, and Double Dutch fulfils all of those.”

Raissa de Haas said: “As well as being hugely exciting commercially, the relationship is a perfect cultural fit – both businesses are Dutch, family-owned and female-driven – we couldn’t be happier.”

Double Dutch was founded in 2015 and no sells more than one million bottles a month in more than 26 countries.