NEW YORK (CNNMoney.com) -- Even though both appear to espouse a healthy lifestyle, both employers and employees can't seem to break the junk food addiction, according to a survey published Tuesday.

The "Attitudes in the American Workplace" survey, produced by the workplace communications firm The Marlin Company, revealed that over half of 751 workers surveyed said that their company encouraged healthy behavior. But 63 percent of those same workers report that having vending machines stocked with junk food at work.

And 74 percent of those workers said that they celebrate a special occasion such as a birthday or holiday with cake, cookies or candy.

Frank Kenna, president of The Marlin Company, puts the blame for the problem squarely on the shoulders of both parties.

"There's plenty of blame to go around," said Kenna.

Kenna says that while companies are providing literature and other resources about how to stay healthy, those same firms are stocking their vending machines with sodas and candy instead of dried fruit.

And workers aren't really adhering to this principle either, says Kenna, noting that less than 30 percent of both male and female workers say their average coworker are taking care of their health.

The survey also found that large and mid-sized companies, which employ as few as 100 workers, or more than 1,000, are more likely than smaller firms to provide their workers with information and resources about healthy living. At the same time, those same sized firms are the most likely to indulge in sweets for a birthday than a company with fewer than 100 workers.

"It's a little ironic that the bigger companies are doing a better job of getting information out there, but they employ people that are having the most cake and cookies," said Kenna.

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