I want to make acrylic bongs but I have no idea what type of molding method are used for this. I know it has to be a mold because I have seen acrylic bongs with grips and custom shapes and without the line down the side from binding two plastic pieces together such as in the picture. I am pretty sure it's not blow molding either because I'm assuming that it would leave the bong soft like a plastic soda bottle. If anyone knows anything about the molding method used to make acrylic bongs then please help! Sent from my LG-LS970 using Grasscity Forum mobile app