WWII vintage US Army 1-1/2 oz ration tins wood alcohol fuel POISON

Lot of three old WWII vintage U.S. military metal cans from wood alcohol fuel for including in soldier's ration kit to heat the food. They have olive drab green paint and are marked on the lids "POISON - wood alcohol fuel tablet". Each tin measures about 2.5" across and 1.125" high. They have some wear and rust.