Products which decompose when exposed to water are disclosed. The products comprise polyvinyl alcohol, talc, polyethylene glycol, and one or more of fiberglass and a titanium complex. The hardness or softness of the products may be varied by varying the relative amounts of talc, fiberglass, and titanium complex used therein. The products may be formed into items such as golf tees, stakes for ground-anchored structures, pellets for firearms, survey stakes and flags.