Heads up! Before you buy it to try it, google "smart lidz review" and take a look at the comments from very angry customers. The key element in many of the complaints is the S&H costs. Almost double the actual price!

Buyer beware, the product itself is very disappointing to most reviewers. They're supposed to be available at Walgreen's and a few other retailers soon, it might be worth waiting if only to stay off of the inevitable five dozen mailing lists to which your name will be "shared".