Case 24 Magnum Tonic Wine Imported From Jamaica Magnum Tonic Wine contains 100 percent natural ingredients. Magnum Tonic Wine is a fortified tonic wine that has found great acceptance in Jamaica and the Caribbean. The Original Jamaican Magnum Tonic Wine is bottled & packed in Jamaica. A unique ready-to-drink offering that is bottled at 16.5% alcvol. The flavour has been compared to ginseng, but with a syrupy sweetness.