A module for adjusting a temperature of a liquid in a container can include an elongate portion sized for insertion into the container, the elongate portion having an outer surface that contacts the liquid in the container about its circumference, the elongate portion housing therein one or more heating or cooling elements operable to facilitate heat transfer between at least a portion of the elongate portion and the liquid in the container. An adaptor attached to a proximal end of the elongate portion has a rim and a circumferential wall that have an outer circumference greater than an outer circumference of the elongate portion, the adaptor defining one or more passages between the circumferential wall and the outer surface of the elongate portion. The adaptor can be coupled to an opening of the container such that the elongate portion is suspended in the container and so that at least a portion of the elongate portion is submerged in the liquid in the container. The one or more passages allow the liquid to exit the vessel while the elongate portion is disposed in the container, allowing a user to consume the liquid in the container while the module is disposed in the container. A plurality of adaptors of varying sizes can be provided to allow use of the module with containers of varying sizes.