Fizzy Bizness (2002)

Best friends Richie and Benji are typical teenage boys who dream of inventing the world's coolest, most portable soft drink, Soda Plops (just plop a tablet in a glass of water for instant fizzy refreshment!). Their dreams of being Soda Kings come crashing down when their lighthouse lab is ruined, but their luck turns when an unexpected treasure washes up on shore and the whole town gets involved.

Unfortunately the movie Fizzy Bizness is not yet available on HBO Max.