For one of his wife's Christmas presents last year, John Schroeder designed a calendar with photos of their family on Snapfish.com (Stock Quote: HPQ).
The cost? About 38 cases of Coke (Stock Quote: KO).
Schroeder, 35, a software developer from Ann Arbor, Mich., accumulated points through Coca-Cola's rewards program, and redeemed them for the gift, which normally costs between $20 and $25.
Each 12-pack of Coke has a code that can be entered at MyCokeRewards.com for 10 points, and the cap from a 2-liter or 20-ounce bottle gives three points, but Schroeder didn't even have to drink that much soda. While keeping his Coke habit to two or three cans a day, he snagged boxes and caps from friends and family members.
"They don’t want to spend the time," says Schroeder, who estimates it takes him only about 10 minutes a week plugging in codes online.
These points programs are a small way to supplement your income by buying stuff you'll use anyway, though your time may be better spent nagging soda-guzzling colleagues to pass along their empties. People have been known to look through garbage cans or recycling bins, and some people trade bottle caps and codes online.
Coke gave away $70 million in rewards last year, according to company spokesman Scott Williamson.
"The plan now is to let (points) build up until the next holiday season," said Schroeder, who writes about the small ways he makes money on his blog, Passive Family Income.
After racking up enough Coke points, you can choose from among dozens of items, including $25 restaurant gift certificates for 280 points, magazine subscriptions for 100 to 200 points, and a car rental gift certificate for 650 points. You can also donate points to local schools.