Flents cola syrup. Flents cola syrup is designed to help relieve basic nausea symptoms. It has a pleasant flavor and it's formula is fast acting. The main features of Flents cola syrup include fast acting formula and pleasant flavor. Product comes in a 2 oz. Bottle. About Flents: Flents has developed a line of innovative personal care Products. Popular products include Insty Splint finger splints, sleep masks, hot/cold water bottles, ice bags and eye patches. Flents products offer simple solutions for at-home health and wellness needs.