being it was a one time incident i'd say no biggie. in the future maybe make the rule "1 jar may be redeemed per visit/purchase" so as to avoid you having to over-purchase/stock too many jars.
i dont know if people should necessarily be permitted to hold onto them and cash them in bulk,unless you and boss dont mind, and can verify they are definitely your jars.
another way to look at it : if i have 10 used up yogurt jars here,and i know i can return them for a *free*(not really) yogurt,that's an incentive for me to go to your store,and while im there probably get some other things...if they're MY jars , or i can only redeem 1... well,no rush to hit the store then.
maybe just my NY cynicism/skepticism.
so longs people aren't gaming the system turning in 25 cent jars for $1 redemption i think it is a wonderful thing you're doing. And i just laughed at the notion of 'gaming the $1 yogurt jar system'. kinda absurd i guess but hey times is tuff
Lastly, he has done something good for the planet, and customers like that. This is win-win-win.
I agree with the win-win-win.
BTW the boss is a she and has an odd understanding of money and potential profits.