Hydrate hands-free while you drive- perfect! Email has been sent asking about an alternative material choice, i.e. ABS, T6061, etc..... Thanks Jon!
Camelbak idea came from Scott Simmons after seeing one hanging from the headrest of his 40 buggy. I thought it was brilliant. I hang them with the straps around the headrest posts, but they're a small PITA to install when full.
I always travel with 2 in the truck.