Abstract: An adjustable holder for a container comprises a stationery member having a first surface for pressing against a first side of the container. A moveable member has a second surface for pressing against a second side of the container. First and second structures allow the moveable member to telescope with respect to the stationary member along a direction of adjustment. Third and fourth structures set a plurality of distances between the first and second surfaces. The third structure comprises a plurality of slots arranged along the direction of adjustment and oriented generally orthogonal to such direction. The fourth structure comprises a resiliently biased projection with a user-operated handle for being inserted into a desired slot. The holder adjusts to the size of the container, and, in preferred embodiments, can be made especially economically.