When I first got started I had a simple coffee cup that was a bit on the large size. I would put hot water in the cup and then put a stainless steel measuring cup in the top. I made lather in the stainless measuring cup. This made a very simple and cheap scuttle (I was working with things I could find in the kitchen). I worked well and eventually my wife purchased a real one (which is much better). The homemade scuttle did work just fine but it was a bit small.

Good luck,
Scott