We’re pretty sure that most of you who travel have luggage tags for easier identification, but somehow the idea of the Keystone Eco Tag solar charger does not sound that appealing to us. After all, how much time does your luggage spend under direct sunlight? Most of it will see it left in the hold of a plane or on a conveyor belt and vehicle trunk. Well, we’re guessing that whatever sunlight it manages to register will be enough to power tiny compatible devices. It takes around four hours of direct sunlight to fully charge the luggage tag, but at least it helps you reduce your carbon footprint by a size. Expect the Keystone Eco Tag solar charger to ship next February for $35.