Grabber Mega Warmers 12 Hour 30 pk.. Just open the package and within minutes the Mega Warmer will keep you warm for over 12 hours. It's dry clean odorless non-toxic and non-flammable. When done just throw it away. Display box contains 30 pads. Package Contents: Grabber Mega Warmers 12 Hour A portable everyday heat source you can take anywhere. Just open the package and within minutes the Mega Warmer will keep you warm for over 12 hours. It's dry clean odorless non-toxic and non-flammable. When done just throw it away. Display box contains 30 pads.