is that water inside of it? or Gel?

i am guessing gel. lasts longer than water

How long do these stay frozen in a cooler?

I have a large soft-sided cooler bag that I used these in and they stayed cold for 6 hours. While they didn't stay frozen, they were still cold and kept the food/drinks cool. Let me add that the temperature outside was also 95!! So, they worked quite well for me.

How long do these take to freeze when fully thawed? Also how long do these stay frozen I have a big lunch bag that I but milk, yogurt, and such in

I'm not sure, I know when I out in freezer at night and wake up they are frozen. I used them in my cooler bag to take pizza from Ohio to Oklahoma on my flight. The flight is usually 5 to 6 hours and my food is still cold

Item Package Dimensions L x W x H	6.93 x 4.84 x 2.2 inches
Package Weight	0.8 Kilograms
Item Dimensions LxWxH	4.7 x 0.7 x 7 inches
Item Weight	1.76 Pounds
Brand Name	Healthy Packers
Color	4 Pack (Blue)
Material	gel
Number of Items	4
Manufacturer	Healthy Packers
Part Number	9090
Style	Simple
Size	4 Pack (Blue)

Healthy Packers

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