Not sure if anyone has answered this. COTTOLENE is a brand of lard. The cans are
 occasionally found in Arizona. Similar examples are embossed:
 
COTTOLENE CONTAINS NO HOG FAT USE 1/3 LESS
 
reference:
 
Hull-Walski, Deborah and James Ayres
  1989 The Historical Archaeology of Dam Construction Camps in Central Arizona.
Volume 3: Laboratory Methods and Dara Computerization. Dames & Moore, Inc., Phoe
nix.