Talk:Day 201-210/@comment-82.168.61.171-20150714191436/@comment-69.135.168.159-20150719034356

I believe vortex or whirlpool is more accurate. A tunnel is a passage between two spaces or points. A funnel is a tool to More accurately move fine matter (sand or liquid) into a container with a small opening to reduce spilling. A vortex is a spinning mass, like a tornado or whirlpool. A whirlpool is a vortex in the water that is wide at the top and narrow at the bottom, often there is a strong undertow in a whirlpool drawing everything towards the bottom. If a funnel is large enough then a whirlpool can form in a funnel as well.