Thanks, Unca, for the redirect to Nancy's post on the BottleBlender.
I wonder if we can buy just the whisker ball thingies.
That little device just about solves the physics of the whole lumpage issue.
Shaking the hot stuff: I know it says not to, but it's just that it can be a mess. Extra energy added results in extra air which results in pressure which when relieved suddenly... Personally, sans blender, I shake.
I've got a couple of shakers that look like overgrown juice boxes (2c capacity, by Rubbermaid perhaps). When I DO NOT put the straw in them, I can shake hot stuff, then pop the top to let off the pressure.
Did this once with the straw in, but forgot to unscrew it slightly to relieve the pressure; I instinctively popped the top like usual. Because the only escape route from the shaker box was submerged, the LIQUID was forced out. Had myself a little Cream o' Broccoli fountain.
I was less upset about the mess than I was the waste of calories -- my, how priorities can change!