I used one for a couple of years - there's a photo of it on the Tripper Sports website:
www.trippersports.com/
(The website has been undergoing the "major upgrade" for years now!)
Perhaps time for a review on the site of a couple of choices. The Tripper has been around for many years, is tried & tested & used by many river paddlers. A juice bag can be slotted into the pocket on the back of the PFD, with a rubber pipe that is routed (held in place with velcro tabs) over your shoulder to the front of the PFD where it can be grabbed & shoved in your mouth.
The PFD has a smallish pocket on the right front, big enough for a set of flares. On mine the material wore out after about 18 months.
An alternate PFD is the "Mocke" designed by Dawid Mocke. I use one - chose it primarily for two reasons. The first is that it has a much larger pocket on the chest that holds all the gadgets that I carry (flares, VHF, Stingoes...). The second is that the juice bag has a bite valve on the end of the pipe. (The tripper has a clip that has to be undone so in order to get juice you have to a) put the end of the pipe in your mouth and b) undo the clip. When you drop the pipe you have to have grab the clip and fasten it again.) When you want juice from the Mocke you just shove the bite valve into your mouth.
Rob
Currently Epic V10 Elite, Epic V10 Double.
Previously: Swordfish S, Evo II, Carbonology Zest, Fenn Swordfish, Epic V10, Fenn Elite, Red7 Surf70 Pro, Epic V10 Sport, Genius Blu, Kayak Centre Zeplin, Fenn Mako6, Custom Kayaks ICON, Brian's Kayaks Molokai, Brian's Kayaks Wedge and several others...