Ecoteas Yerba Mate Set: Fire Gourd with Bamboo Bombilla These mat vessels are decorated with fire designs to achieve a speckled sheen reminiscent of a jaguar's coat. It is necessary to cure your mat gourd before use. This process removes the bitter gourd taste from the vessel. This attractive natural bombilla in a great combination of good function and affordability. Natural fire gourd with a cane bombilla: A great Yerba Mate Set