Abstract: A beverage container having a baffle system which may be inserted into the container for reducing the splashing sound caused by sloshing within the container. The baffle system of the present invention includes an elongate tubular core having a longitudinal axis. A plurality of deformable fins are attached to the tubular core in spaced apart relation along the longitudinal axis of the core. Each fin extends in a direction perpendicular to the longitudinal axis of the core. Each fin has a generally disc shape and includes radial slits through the fin to allow water to pass between the slits within the bottle. The central core is hollow and may be used as a straw for drawing liquid from the container by a user.