A soft drink is a non-alcoholic beverage other than water. They are typically sweetened to a greater or lesser extent. fruit juice, iced tea and soda pop are are all examples of soft drinks. Soft drinks were uncommon in period, as tea was unavailable in Europe, sugar extremely rare, and fruit juice mostly made into wine. The closest thing to a modern soft drink generally available was small beer.
Soft drinks are common at SCA events, as they are safe for children to drink and have no deleterious effects. Many fighters prefer athletic drinks like Gatorade rather than water on the field, as they rehydrate more efficiently than water alone.