These are Rubberized insides w/ canvas covering.
Ice wasn't always available at places that sold gas, this was a better alternative to a jug of water.
Farmers/Sod Busters use to place a jug of water in shade & place a wet burlap sack over it for a cooler drink during the day.

Last edited by Dick Bennett; Tue Apr 08 2014 04:23 PM.
Reproduction/Fantasy Cans
http://i124.photobucket.com/albums/p2/oldegaspump/AllCansMASTERTHUMBNAIL_zps4bfdbbc7.jpg
Rnd Can Re-lids