I got them free from American Express. Which begs the question: If they were free, how did they cost $3700? Glad you asked. American Express gives you a point for every dollar you charge, so I used points to get the glasses.
Granted, I did get $3700 worth of other stuff, too. But, philospically, one could argue that it was the other stuff that was free...
PS: This is the fountain around the Navy Memorial.