2011 New material Hot-water bottle with knitting bag
1.Don't use electricity
2.Heating 2 minutes keep warm for 8 hours

 2011 New material Hot-water bottle with knitting bag

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.