Print slow for best results, I recommend using a .4mm nozzle with .25mm height and .35 line width at 100% infill to keep the print air tight, before printing I highly suggest inspecting your filament to make sure their are no visible bubbles because it does effect the print and will cause it to leak. Please take a look at the other files (.jpg) for more info. Good day and Good luck. NEVER LIGHT PLASTIC ON FIRE, THE POISONOUS FUMES ARE DEADLY, use a glass bowl or attachment. I do not condone under age smoking.