There seems to have been a marketing craze in the mid 20th century (50s, 60s, 70s) where companies went nuts packaging their products in all kinds of decanters. It was not enough to sell the product in a plain old bottle.
Here is a bit of info on tax stamps:
http://www.drinksplanet.com/dating-us-bottles-via-tax-stamps...-1205.html
Wander into a liquor store today and you will see that the hard liquor all has Federal stamps.