The following commentary comes from an independent investor or market observer as part of TheStreet's guest contributor program, which is separate from the company's news coverage.By Tim Begany NEW YORK ( StreetAuthority) -- To make money in stocks, some investors prefer to "fly under the radar," holding shares of companies that operate in the background by helping big-name firms do what they do best. One reason I like these "behind-the scenes" companies is they don't get nearly as much press as such well-known stocks as Microsoft ( MSFT), Wal-Mart ( WMT) and General Electric ( GE), so they may be less prone to price behavior related mainly to investor sentiment and speculation. One of my favorites provides an essential product -- aluminum cans -- to several top beverage companies including Anheuser-Busch InBev ( BUD), Pepsico ( PEP) Coca-Cola ( KO). It also makes metal food cans, aerosol cans and metal jar tops. In fact, it's the world's largest producer of metal packaging, though I doubt many consumers or investors would know it, probably because most care a lot more about what's in a beverage can than about who made the can.