A composition for topical application to a part of the body comprises a vasodilator, for example glyceryl trinitrate, as active ingredient dissolved in a blend of volatile and non-volatile solvents of different solvating capacities for the vasodilator. The prepit portion includes first and second prepit portions divided in a track direction with a prepit of the respective first and second prepit portions being arranged on a boundary of the respective tracks. The fasteners are fixed to the sidewalls of each data storage device, respectively, and each fastener includes a head portion abutting the corresponding sidewall. The internal power source can store power received via a connection between an external power source and a conductive surface on the nozzle housing and supply power to the stylus’ electrical components. When the rotation limiter is in a first position, the rotary plate is in an unfolding position, and is prevented from substantial rotation due to an abutment of the blocking element against the rotation limiter. The watercraft includes a propulsion device, such as a jet propulsion unit, and an engine that powers the propulsion unit.