an attachment body configured to engage with an interior surface of a container at an outer circumference of the attachment body, the outer circumference of the attachment body disposed within the container;

a bottle seat attached to the attachment body above the attachment body, wherein the bottle seat is configured to engage with an upper surface of an opening of the container at a lower surface of the bottle seat, the lower surface of the bottle seat positioned above the outer circumference of the attachment body and disposed outside the container;

a housing coupled to the bottle seat and configured to be located outside of the container when the attachment body and bottle seat are engaged with the interior surface of the container;

a spout extending from the housing;

a fluid passage connected to the spout and extending through the attachment body and the housing;

a fluid sensor coupled between an external surface of the attachment body along the outer circumference and an external diameter of the fluid passage, the fluid sensor located entirely within the attachment body such that the fluid sensor is positioned below the bottle seat and within the container when the attachment body is inserted into the container, the fluid sensor configured to output a fluid signal based on a fluid within the fluid passage;

a fluid control device coupled to the fluid passage to selectively permit fluid to pass through the fluid passage to an opening of the spout; and

processing circuitry coupled to receive the fluid signal, wherein the processing circuitry is configured to control the fluid control device based on the fluid signal.