MR.ICE Dry Ice for Shipping Frozen Food 15 Packs - Cold Packs for Shipping - Dry Ice for Drinks Coolers Dry Ice Packs - Freezer Packs for Lunch Box - Long Lasting Ice Packs, 6.9" x 4.7"

They kept cold for a great length of time. Next time I use them, I would probably not fill them up with water as much because it wasn’t really comfortable trying to fit them in when they were about the size of a pop can. Would probably try to get them flatter next time. But overall effective. Would get them again.

When you have to ship beauty products in the mail during the summer, you NEED ice packs to keep your products intact. My company Blair & Bloom has used these ice packs to ship beauty products so they remain intact while in transit. They fit perfectly; freeze quickly and are still cold by the time they get to my buyers.

They work.However the stuff comes out ice packs

These were not great. They did expand very big but then burst in the freezer. Not ideal for a lunchbox or anything like that.

Allowed to soak 2 minutes 30 seconds to avoid expanding too much, based on prior reviews. Froze over night. Started wtih two ice packs. Each solidified approximately the size of a 12 ounce soda, both in diameter and length. Two were utilized and both were completely defrosted within 2 hours 10 minutes. These were in an enclosed insulated container with approximately 1 cup of water. I placed them in sandwhich ziplock bags first to avoid absorbing any additional moisture or water, to hopefully prevent them from splitting. Clearly did not last 4 to 7 times longer than ice. Note it was used outdoors in 103 degree temperatures. Used these three days consecutively, with temperatures 103 to 108. Longevity of staying cold is 2 hours to 2.5 hours. Pending the quantity utilized and preventing them from absorbing more water, hopefully they will last a while. For now 3 stars. Reasonable price for 15 packs. Uncertain how they will hold up. Clearly over stated "cold" time from the description.