A novelty vessel accessory may include an external surface having an upper external portion and a lower external portion, a lower opening situated at the bottom of the external surface, and an engaging internal surface substantially concentric to the lower external portion and defining an annulus between the lower external portion and the engaging internal surface. The novelty vessel accessory may include an upper opening situated at the top of the external surface and a conduit internal surface substantially concentric to the upper external portion and defining an annulus between the upper external portion and the conduit internal surface. The novelty vessel accessory may have its external surface formed into an advantageous shape or have an advantageous color. The novelty vessel accessory may include a vessel insertion lip connected to the top of its engaging internal surface and extending down substantially concentric to the engaging internal surface such that the vessel insertion lip and engaging internal surface sandwich the upper portion of the open mouth of the inserted cylindrical vessel. The novelty vessel accessory may also include a flow-control member connected to the top of its engaging internal surface such that fluid exiting the mouth an inserted cylindrical vessel pass through the flow-control member and the top opening. The novelty vessel accessory may also include a removable stopper member engaged with its upper opening, wherein fluids are prevented from exiting the upper opening until the removable stopper member is removed.
