Instant japan winter pocket hand warmer

Item Name.	Hand warmer / Hot Pack
Item Material	PVC
Item printing	Excellent silk printing/screen printing/ offset printing
Colors	Almost each Pantone color is available
Place of Origin	Shanghai
MOQ	3000pcs
Package	Opp bag/color box/PVC box/display box/clamshell box
Brand	TouchPack/ OEM
Delivery time	25days after samples confirmed
Certificate	FDA/MSDS/SGS/CE/EN71/6P/ISO

Instructions   What is the pack?   The Instant Heat Pack contains water, a stainless steel disc and non-toxic food grade sodium acetate. This chemical even edible. It is also used as a food preservative! This means that it's safe for children or pets too!   How long does the heat last?   The Instant Heat Pack stays hot for about 30 minutes ~ 2 hours, and then gradually cools down. 
It really depends on three factors: Size, How it is used, & how well it's insulated. 
To make the pack's heat last longer than normal, do the following things: 
First, once the clicker has activated the pack and it gets hot, make sure to squeeze the pack well to get it soft and flexible. This will bring the pack to its maximum heat and will therefore make the heat last longer. ( A lot longer! ) 
Second, keep the cold air away from the pack. If using it for handwarmer use, put it inside your pocket for instance, instead of just in your hand. 
Third, keep the pack as insulated as possible. Use an insulated pouch, muff, covers, etc. This will make a big difference too.   How many times can it be used?   In fact, there is no limit as to the number of times an Instant Heat Pack can be used(mostly 200 -500 times). The pack will not operate if there is a hole in the vinyl.