There is always a way if you want to spend the money. My 2 cents is just by the pouches. they are around $4.50 a piece. By the time you get the stainless steel or suitable plastic then cut those to the right size, drill them, instill fittings so you can then make and attach a drop tube to sit at the bottom of the bottle, get a fitting for the outside so you can then attach a purchased nozzle for dispensing beer then buy fittings to attached a cheap regulator setup for the CO2 you could buy over 20 pouches for that for way less hassle.