2011 new design microwaveabld hand warmer / hot cold pack
1.New materials
2.Keep cold and warm long time
3.Environment friend

2011 new design microwaveabld hand warmer / hot cold pack 

Heat up in microwave oven:

wattage         time

500W             3 minutes 20 seconds

600w              3 minutes

1000w            2 minutes

New hand warmer, heat 2-3minutes it can be keep warm for up to 8 hours!

Put it in to the fridge, it could be cold bag, keep cold in summer.