Abstract: A drinking glass having a cup portion, a stem attached to the cup and upon which the cup is supported, and a detachable base engageable with the stem in two distinct alternative base positions. The base is capable of securely maintaining the drinking glass at rest in an upright orientation in at least one of the base positions on a range of support surfaces. The range of support surfaces suitably includes a hard even surface and a penetrable uneven surface. In one embodiment, the base is in an upright position and the drinking glass is maintained in an upright orientation on a reasonably flat surface by means of a flange. In this upright base position the base engages with the stem via mating engagement of a spike in a hollow interior of the stem.