The Vintage Union Jack Mini Hottie by Natural Products is a self-heating, reusable hand warmer. It works like a tiny hot water bottle, but it will last for hours; ideal for taking with you when venturing in the cold weather. The Mini Hottie is a little pvc pouch filled with gel. It is easy to use as all you need to do is click the little metal disk inside the bag that will release the heat & harden the gel. You can slip it into your gloves or pockets to keep your hands warm. It will stay hot for hours & you can recharge it at home in boiling water. It comes with a lovely soft acrylic, knitted cover. When you are out & about, in the city or travelling, if just gloves won