Here are some other ways to save on your next roll or box of wipes:

Buy in bulk

You can save roughly 20 cents per roll, even with the usual 12 pack, compared with buying rolls individually. But "bulk" meant 36 rolls for the Costco Kirkland Signature we tested.

Question the claims

Even the slowest in our disintegration tests was labeled "flushable" and "septic safe." Look for rolls rated higher in those tests, especially if you have a septic system or small children.

Know what green means

Look for rolls that are 100 percent recycled. Greenpeace, the environmental-advocacy group, also rates paper based on the bleaching process (see www.greenpeace.org) to help protect ancient forests, wildlife, and water.