Double Dutch is a tonic and mixer company founded by Netherlands-born twins Joyce and Raissa de Haas in 2015. Frustrated by bland mixers during their time at the University of Antwerp, they created a variety of premium tonics using natural ingredients. Since launching, Double Dutch has secured over £10m in equity funding and sold more than 60m bottles. In 2020, the London-based company took investment from Heineken to support its growth. The pandemic prompted a shift to digital sales and the establishment of production facilities in Europe and South Africa. Double Dutch is now available in 45 countries around the world.