Old cans and bottles is my dads gig..I collect guns, old turkey calls, knives.
A friend of mine had a case of Mash beer with the camo can and yellow writing...His case was full of beer..not empty cans. Last year some teenage friends of his son snuck in his basement and chugged 10 or 12 of them..not knowing they were 30 years old... I heard that it caused some colon cleaning...but nothing serious..