Abstract: A cup adhesion device is described as an inexpensive cup with compressible interior tabs, having the ability to slip around the bottom of a storage bottle and be held tightly by compressive forces as the tabs are flexed. Nonpreferred embodiments have the tabs replaced with small compressible invaginations into the cup's sidewall, or are two part designs that require a prior art cup to be clipped to the adhesion device as it is gripping the bottom of the bottle. All embodiments allow for the later removal of the cup to allow it to be used as a fluid containment medium for some of the contents of the bottle. This allows for a hygienic transfer of fluid to an individual or small animal without the recipient drinking directly from the bottle, and either the convenient storage of the cup back around the bottom of the bottle for later additional use, or the disposal of the used cup if no longer required.