Abstract: A clamp clamping a side of a container has a head portion and a pair of leg portions extending from the head portion and partially abutting opposite surfaces of the side of the container when in use. The head portion has support part angularly inclined to the leg portions. A first permanent magnet is mounted on the support part of the head portion in a manner whereby the magnet releasably holds a brush via the magnetic metal part of the brush over the lip of the container with the bristles of the brush over the open container and sloped downward from the handle of the brush, so that liquid on the bristles will drip into the container without befouling any of the brush, the container, or the proximate area of the container. A second permanent magnet is mounted on one of the leg portions of the clamp in a manner whereby the second magnet magnetically couples the clamp to a magnetic metal container.