Fortisip Bottle Fortisip Bottle is a nutritionally complete, milk shake style nutritional drink for the management of disease related malnutrition. Fortisip Bottle is high in energy (1.5kcal/ml) and can be used to supplement the diet of those unable to meet their nutritional requirements from other foods, or as a sole source of nutrition. Fortisip Bottle is ready to drink and is available in 8 delicious flavours: Neutral, Vanilla, Chocolate, Toffee/Caramel, Banana, Orange, Strawberry, and Tropical. Simply choose above. Fortisip Bottle is best served chilled and Fortisip Bottle Neutral may be added to sweet and savoury foods. Fortisip Bottle is gluten and lactose free.