Magnum drink ingredients are made from the best quality substances, a reason it is a go-to drink in Jamaica. The ingredients used in this tonic wine consist of water, white grape juice, fructose corn syrup, citric acid, fresh grapefruit juice, artificial colour, natural flavouring, sucrose and preservatives, like potassium sorbate and potassium metabisulphite. Magnum is a cherry-flavoured drink. It's bottled at 16.5% alcohol by volume and has a syrupy sweetness with a distinctive cherry flavour.