Funnel

A utensil in the shape of an inverted hollow cone terminating in a narrow pipe, for channeling liquids or granular material; typically used when transferring said substances from any container into ones with a significantly smaller opening.

A passage or avenue for a fluid or flowing substance; specifically, a smoke flue or pipe; the chimney of a steamship or the like.

To use a funnel.

To proceed through a narrow gap or passageway akin to a funnel; to condense or narrow.

"Expect delays where the traffic funnels down to one lane."

To channel, direct, or focus (emotions, money, resources, etc.).

"Our taxes are being funnelled into pointless government initiatives."

To consume (beer, etc.) rapidly through a funnel, typically as a stunt at a party.