Interesting shaving idea: the Moss Scuttle
This is a revision to bring the post up to date.
The Moss Scuttle is a refinement of the lathering cup—it’s a heated cup to hold the lathered brush. (The bowl part of the Moss Scuttle is, most find, too small to use as a lathering cup.) The post at the link explains exactly how it’s used (with photos). The short version: it has two compartments. Fill both with water as hot as you can get it from the tap.
As it turned out, my tap water didn’t get hot enough for the Moss Scuttle to satisfy me. I have the water heater set so that pure hot is just right for a shower.
So I got a Sunbeam Hot Shot and used boiling-hot water in the Moss Scuttle, which did keep the lathered brush hot. But: DO NOT soak your brush in water that hot—it ruins the bristles.
Leave the hot water in the Moss Scuttle while you shower. Then after the shower, empty out all the hot water, and fill only the inner (bottom) compartment with hot water: this will keep the upper cup hot. Rinse the brush with hot water, then charge it with soap or cream and develop the lather in the (hot) upper cup. The result: warm lather—very luxurious. After the first lathering, let the brush lie in the hot cup while you shave with downward strokes, then re-lather (the brush still warm) before shaving with upward strokes.
I would develop the lather in my soup cup, then transfer the fully lathered brush—which easily contains enough lather for 4 passes—to the small Moss Scuttle, where it fit snugly against the hot walls. But then I found that, for me, the lather would degrade under the heat. YMMV.
You can order it here.
UPDATE: Here’s my (later) post on the gourmet shaving experience, a guide for the novice.
UPDATE 2: My own Moss Scuttle has arrived!