[Vwdiesel] espar vs webasto coolant heater?

[LBaird119 at aol.com]

  I know that Dave Puleo (former list member) used a vacuum thermos 
bottle type of thing. It held a couple gallons of extra coolant and in 
winter would start and the heater would put out warm air even, after 
about 20 hours of sitting.  Don't remember what it was though.
     Loren