Abstract: A retainer strap for holding in closed position a lid, preferably having a top handle, upon a container, such as refuse or garbage can, having opposed open-loop side handles. One end portion of the strap is folded back upon itself and slidably retained by a buckle member to form an adjustable first loop extending through one of the open-loop side handles, while the opposite end of the strap extends through the opposite side handle and is folded back upon itself and retained in a fixed second loop by a pair of detachable snap fasteners. The middle portion of the strap either extends through or over the top handle of the lid, and the buckle member is adjusted to tighten the strap in operative position against the lid to hold the lid in closed position upon the container.