Using tips: before using it as cooling the wine ，you have to put the bag in the  refrigerator freezer for one hour ， then you can put  wine in the bag so that  it can cool the wine and it works very well and it can keep cool  for several hours.  On the other side ，thisbag can also be used to warm up the wine or other beverage，you put it into the microwave oven  heating  up for one minute or boiled  water  heating  up for 5 minutes before useing .the bag can be used repeatedly . it is a good choice for picnic or outdoor activities.

';