Discover Lava Shells: the world's first naturally self-heating massage tool. Once you have had a Lava Shell massage, you'll wonder how you went so long without one. Each Retail Kit comes with one shell and four Lava Charges, so that you can take them home to have that warmth and beauty when you need it. Lava Shells use natural synergy of ocean inspired elements to create unmatched comfort. Minerals, dried sea kelp, algae and salt water generate an hour of soothing heat and relaxation. Just two easy steps to massage bliss - no electricity, microwave or battery required. The Lava Shells Retail Recharge Kit contains four charges, 1 bottle of botanical massage oil, and an instruction sheet.