Abstract: A container-holding device removably attached to an external, rigid support, such as a riding saddle for a horse, wherein the container-holding device prevents spillage of a container held therein in the event that the external, rigid support experiences sudden and substantial movement. The container-holding device is provided with a retaining ring and a plurality of flexible support members extending downwardly therefrom. A base member is attached to the flexible support members at flexible support member ends opposite the retaining ring.