SILICONE DOWNSTEM IS REALLY EASY TO USE. ONCE YOU'VE ADDED WATER TO YOUR BONG OR DAB RIG, YOU CAN SLIDE YOUR DOWNSTEM IN THE FIXTURE AND THEN YOU'RE READY TO USE IT. FEATURES DOWNSTEM IS MADE OF FOOD-GRADE SILICONE HEAT-RESISTANT EASY TO CLEAN DISHWASHER SAFE