It is one of my regular grocery stores. I also check the vending & Coin Star machines in the three grocery stores (and any other establishment) I frequent. The tellers at my Credit Union save all the foreign coins they encounter for me. When they give me a batch I buy the ladies Dominos or Subways for lunch. As long as the "coins of interest" show themselves, I'm willing to oblige and "apprehend them."
You remind me of a story that happened last week. My wife and I went to the Carwash and on the way out of washing I saw the vacuum machines. Now, you know what I was thinking. Yup. Trying my luck with the change returns. Then I remembered that she has OCD, in particular, germs, so I passed on the idea of having her stop.
I once got the Snapple bottle cap that said You Win a year's worth of Snapple (one of their promotions. I sent them the cap and they sent me a booklet of coupons, more than I could drink, so I gave them freely to my CRH suppliers! Goodwill goes a long way...sometimes.