The hottest item of 2011! Sold in boxes of 4. Fits any mason jar. Use these lights outside or inside. Water-resistant solar cell, replaceable and rechargeable battery, and bright LED are tucked inside this standard size mason jar lid. Packaged with an attractive header card. Jar is not included. Use indoors and outdoors. Water resistant. Fits any jar with a standard mason jar lid. Includes a long-life battery, that is easy to replace. Automatic switch – lights automatically when it’s dark.