On 8 Aug, 14:37, Tudor Hughes wrote:

A funnel stuck in a milk bottle is more reliable.

I'd often thought that too but never actually tried it.

Imagine a collecting area of one square metre! My goodness, you could
measure to an extraordinary precision. Now I have an old dustbin lid
that might do the job perfectly..... Rainfall measurements to .001
mms. Wow! Eat your heart out Met Check.

Jack