Raissa de Haas is one of the Dutch twin sisters behind Double Dutch, the immensely popular premium mixer brand. Both sisters studied economics at the University of Antwerp where they regularly threw parties for friends. Frustrated by the low excitement level and quality of the usual mixers that go along with spirits like Gin, they started making their own mixers. A hobby became a passion and a few years later after graduating at UCL in London, they launched Double Dutch, a company that makes premium mixers and tonics. In 2015 they won Virgin’s Foodpreneur award. And in 2019  the twins were recognised on Forbes’ 30 Under 30 Europe list. In the meantime Double Dutch sells over 1m bottles per month, and are available in 26 countries. Earlier this year the Dutch beer giant Heineken took a minority share in the sisters’ company.