You need a Melamine cereal or noodle bowl. Search eBay for Melamine Bowl and look for one that is 6-8" in diameter.
You need a polypropylene funnel of the appropriate size,
You need steel washer with a hole that is big enough to fit over a piece of Hulme case feeder tube,
You need some silicone sealant to glue the washer to the bottom of the cereal bowl and the cereal bowl to the funnel.
Oh, and the piece that secures it to the link is a plastic plumbing T. Not sure if it is PVC or what, but you will find it at Home Depot.