Introducing a regular-looking pizza box with a special touch. The difference is that the box can come apart once it's delivered by your local pie dealer. While it starts out the size of a standard pizza box, customers can break the platter-size square into four plate-size sections using scoring and perforations.

Voila--a trashy dinner service for four, with no wasting water or soap on dishes after. I guess that sorta makes this box "green," as the manufacturer claims. If annual pizza consumption numbers in the billions, as some theorize (though of course, some must be served on plates in restaurants), sure, this could have some effect if everyone used it. Okay, maybe the "green" angle is a slight stretch, but it's also true that no trees died for the box, either. It's made from 100% recycled material, which presumably can be recycled again after supper. Every little bit helps, right?

I'm all for being eco-friendly -- I try to avoid waste whenever I can. But there's a fine line between doing right by mother nature and acting like a complete poser and an article (subscription required) in today's Wall Street Journal shows that many, many people are crossing that line.

The Shopping Around column highlights 4 trendy reusable tote bags designed for carrying your groceries and, perhaps more importantly, showing people how green-friendly you are. The Bring it in a Bag Market Bag -- emblazoned with the slogan "Green is the new brown" will set you back $15.99.

Folks, here's the thing: wasting money on an expensive, and I would argue preachy, bag runs counter to the whole anti-waste movement. Wouldn't it be more humanitarian to buy a cheaper bag and donate some money to charity?

Here's an idea: instead of buying an overpriced bag from a for-profit company, try combining environmentalism with supporting your community. Many libraries offer canvas tote bags, with all the proceeds going to buy books and pay for other services. A win-win!

If you need your green-friendly bag to preach to people you run into at the grocery store, I think you have to question your true motives for going green.