Bottle, Comb, Crutch, Wrench
Hot-water-bottle: filled and sealed. Used to provide warmth, typically while in bed. When applied to a specific part of the body as the main section of a car or aircraft.
A-comb: toothed dispersion device used for styling, cleaning and managing, in order to roll over or break at the crest, as a wave.
Crutch: transfers legs, legging, and leg weight to the upper body; a long stick with a crosspiece at the top supporting reassurance in difficult times.
Wrench: open-ended spanner for grip and mechanical advantage, in turning objects distressed by departure