https://www.pepcoin.com/home
Pepsi has this new gimmick where basically you have to buy specially marked drinks and snacks - in pairs - a drink and a snack - and enter in the codes you get. You can read the rules above. If you have the time and energy to make a "Pepcoin" account on their website, and link it to your paypal (I'm not, too risky and too little reward for my taste), but you link it up and get credit toward cash rewards for every CODE you type in. In case this takes off, I have devised a suggested "indexing/labeling" system. Here are the first two codes, they come from drinks, so you have to pair them with snacks for big bonuses:
Alpha: CTFYHTPM6P (20 oz Pepsi)
Bravo: 4MTXNR3CCY (20 oz Pepsi)
So if you throw one in there, say what it's from and use the next letter of the alphabet. If you used one already posted, say "Alpha" is (spent/gone/used), for example. I think they are about a nickel apiece. Read the rules before you sign up and play. I really have no interest, but though I would share the codes before tossing the bottles away.