Fast reply from Zimmer. For the same price, lighter weight than HMG's new offering and my crackers won't fall out.
"I have built 2 different types of Porter pockets, the ones like Nico's that are pleated and one like Seth Brewer's at the top of the link you sent, that are more 3D shaped/square bottom. Both clip to the packs webbing the same. The 3D shaped ones will hold the bottle lower in the pocket because of the flatter bottom where the pleated one will carry the bottle a little higher, but will lay flatter when not in use. I find the 3D pockets to hold a bottle nicer because it sits lower. The 3D shaped pocket weighs 3oz for a pair and the pleated ones weigh 2.75oz less a pair.
The pockets are $25 each plus $4 shipping.
I can build them in either black Dyneema X or White Xpac if you want to match the pack color.
If your interested in a pair just let me know which ones and what material and I will send you a paypal invoice for the total.
Thanks again for your interest,