a dispenser for dispensing a thermoplastic product in a fluid state , the dispenser including : a case having a manual holding part ; a reservoir composed of a wall forming an enclosure for holding a supply of the product ; a product applicator disposed in proximity to a reservoir opening for receiving product in a fluid state from the reservoir , wherein at least a portion of the reservoir wall is made of an electrically conductive plastic constituting a heat source , and the dispenser further has electrodes connected to the electrically conductive plastic of the reservoir portion for delivering heating current to the heat source .