Here's what other sites are saying:
New innovative handheld pack is designed especially for UltrAspire's gravity assisted angled bottles. Comes standard with a Human 16 oz. bottle. Stretch mesh sides carry energy gel or other items. Air mesh sleeve holds bottle, keeps hand dry and serves as insulation.
UltrAspire Isomeric 8 oz. Handheld
UltrAspire Isomeric Race 20 oz.
UltrAspire ISomeric Magnon Water Bottle
UltrAspire ISomeric Pocket Water Bottle
Nalgene 32 oz Wide Mouth Tritan
$7 - $11
CamelBak Chute 1L
$12 - $14
Nalgene 16 oz Wide Mouth Tritan
$6 - $8
CamelBak Chute .6L
$8 - $13