Emoji patterned reusable hand warmers, available in 8 different patterns To activate the hand warmers, press on the metal disc until you hear a click. The liquid will then generate heat for around 30 minutes. To reheat, boil the warmer in water for around 10 minutes until the crystals inside dissolve. Use as above. Size : Round 100 x 100mm approx. Others 100 x 80mm approx
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