Before I jumped right into the copper, I thought I would ease myself in gently and make copper funnel...
It 7" wide, tapers to ½" over 4" with a spout of ½" x 4". Used a half-flap seam and soft soldered inside and out as well as the spout...
So Here she is... Made it in about an hour...

If you want the recipe just holler and I'll update the post with a template...

EDIT:
Heres the pdf... Note, its not to scale, but all sizes are relevant to the above funnel...