Alky6
150cc
where are you getting the third fitting with the nipple to attach the fill/drain line to? I have the psp cap but it only came with the vent fitting.I think I am going to start out with a 23.7 oz Smart Water bottle with a PSP cap that I already have. This has worked great on 3 planes so far with a Fiji bottle. . I agree with you that the SWB cap for the DuBro looks the best. I am a three line guy so the DuBro is a little harder than to do than the water bottle designs.