kind of expensive isn’t it? That is more than the price of the most expensive bladder on the market.

Why 2 ports?

Liquid out, air in.

Interesting, although at $30 it isn’t much savings over a new Platy or Camel. Cool innovation though, and it reuses a bottle you already have, which is somewhat more “green” than buying an entire new bladder, I suppose. Thanks for the share.

Yeah, it DOES seem expensive for an “alternate” system. And I don’t get the two ports either. Is it gravity fed (turn the bottle upside down) or is there a straw attachment? I’m confused…

Jetflow is shooting himself in the foot.
The attachment has a commercial value of about $5. Make it cheap and you will see sales because at $30 you won’t. As pointed out before: why buy something that is not as good as an existing system and costs more?

Platypus Drinking Tube Kit (http://www.backcountry.com/platypus-drinking-tube-kit) for USD12.95

SmarTube
(http://www.racingtheplanet.com/store/smartube.html) for USD20.00

Its not expensive if you get the full story on everything included. The $30 includes 2 replacement hoses, a new bite valve (the same sold for $10 by others), a check valve, a nalgene style bottle and 2 adapters. If you want just a manifold and nothing else then yeah , it is $5.

drill 2 holes in an average soda cap stuff a quarter inch hose in each hole. one hole and hose is for air the other hole and hose is your is for your drink one hose is 2 feet the drink hose should be about 3 feet. use a sawed off clothes pin for a stopper. start sucking when your done