I've bought two of those Tap-A-Draft bottles, but have not used them yet. I've been playing around with my own tap designs, I have one that has worked well on mini-kegs, and I just found a super-easy way to adapt it to these jugs (which have the same neck size/thread as 3L PET soda bottles. But I just tried an alternate method that is even cheaper/easier - but I need to run it through a few cycles to assure it is reliable.
With my design, you can use a standard kegging CO2 source, cheaper in the long run than those little cartridges. I'm also working on a cheap way to use a paintball tank, w/o the expensive regulators and adapters.
A question for you - do you find the beer can sit in those Tap-A-Draft jugs for 6 months or so w/o oxidation? I know people get concerned about oxidation through plastic - but I'm not convinced it is a real-world issue. I've read that these jugs are identical to what Miller/Coors 'home draft' comes in.
-ERD50
My buddy knew the Miller/Coors rep when my town was selling 'home draft' units (sadly, we are no longer a test market). But he'd pull the date expired kegs, dump it, and I got lots and lots of bottles and taps for $3 each. The brewing closet with my cardboard shelves:
Even though I've got tons of MHD taps, I'd be interested in seeing your design for a tap alternative. I don't pay much for CO2 (just 2 bucks to deliver 5 gallons if I don't force carbonate). I don't mind the extra expense since I like the "freedom" to toss a keg in an insulated box, no hoses, no regulators, and head out to an event.
The TAD bottles are very similar to the MHD bottles. If you have insomnia, you can check out my you tube posts (I'm known as sengsationa1 over there ... ending in a "one" because I lost the email address associated with the user name spelled "the right way").
I've made the same observation about the 3L bottles (I get 'em at the dollar store and dump the pop).
As to the "freshness in plastic concern", I think it's not a concern. Although oxygen can migrate through plastic, it's on the parts per billion level with the MHD and TAD bottles (not sure about 3L soda bottles...they're not the same layers). I routinely have beer in these bottles for many months, both tapped and capped. I've tapped a few that were over a year old without oxydation. You get the same kind of age profile, as far as I can tell, as storing in glass. But you might want to check out the video about the MHD bottles failing when I had a highly carbed beer in one. The failures were MHD, not the new TAD bottles, which have a rounded bottom, not one with molded-in "feet".