funnel

a conical shape with a wider and a narrower opening at the two ends

a conically shaped utensil having a narrow tube at the small end; used to channel the flow of substances into a container with a small mouth

(nautical) smokestack consisting of a shaft for ventilation or the passage of smoke (especially the smokestack of a ship)

move or pour through a funnel; "funnel the liquid into the small bottle"