Leanne that heater is identical to a heater that is used in a fish aquarium. I don't believe they are available in the U.S. but found mostly in the UK. So, you better be packing some up to give out as party favors at the wedding. I have seen some threads where people are using aquarium heaters to get there must started in cold basements but I don't know how they compare to using a brew belt. Maybe Luc could give some Guidance here.