So I have been using a soup mug in a sink of hot water since I started and the lather stays "warm" though not hot like I imagine it being. When you use a scuttle do you fill it with hot tap water or are you guys microwaving it or using boiling water? My morning routine is long enough as it is, I definitely don't want to add a teapot to the mix too >.<

Will hot tap water in a scuttle keep the lather hotter than a bowl sitting in sink of water?