I think Oregon has the right idea. We did invent the bottle bill, so I guess that isn't a complete surprise. The redemption value is tied not to inflation, but to redemption rate. If it drops low enough, the deposit is increased. We started at 5 cents, and in 2015 the redemption rate had slipped down to 65%, so the deposit was doubled to 10 cents.
Ok so we raise money to rent giant warehouses, hit the streets and buy up all the bottles for 10 cents, and then just warehouse them. Redemption rate slips, deposit increases -> profit.
