It would appear your dump dates to the 1930s,40s,50s - you can definitely date the Federal Law.. embossing to that era.
Liquor bottles of this era are not really worth much unless they have labels / packaging.
Undoubtedly you will find a lot of items that have little value but it can be worth continuing for the exceptions - older items tossed in, milk bottles and some other items of the era.
Good luck and please report back with other photos