Never heard of one. Anyone else?
Duckie

It is a superior system for heating moist hot packs and most other consumer
methods are not as effective.  Many consider the Hydrocollator and
associated hotpacs the gold standard for moist hot pack treatments.  The
microwave pacs do not seen to last long enough and some specify that they
are not to be heated unless immersed in water in the microwave.

The larger Hydrocollator heater units are expensive and are mostly used in
hospitals, doctors offices, chiropractic, physical therapy, etc.  The
smaller ones are also sold and used in the home.  The pacs are inexpensive
and can be used hundreds of times.  The hotpacs and terry covers are widely
available.  My only problem is that I do not want to have the unit on 24/7
to keep the water hot.  I have heard that some have used a timer to operate
the unit for a lesser amount of time but I need to communicate with someone
with that experience.

Thanks

Martineau