traveling by train for 24hrs., need something to keep yogurt, milk, string cheese and insulin cold for the trip in a small soft sided cooler.

Hi Nancy,They can last for 18 to 24hrs depending on the ambient air temperature if you follow the following hints:HINTS FOR OPTIMUM PERFORMANCE OF YOUR TECHNI ICE REUSABLE DRY ICE PACKS / GEL PACKS1. Always use a minimum of 1 sheet per 7Qt of cooler size. The more mass of Techni Ice reusable dry ice packs / gel packs the better, and the longer it will last. Techni Ice reusable dry ice packs / gel packs take up less room than regular water ice, and is lighter.2. Place a sheet or more on top of your food, as cold falls.3. The colder the food or drinks are when placed into the cooler, the longer Techni Ice reusable dry ice packs / gel packs will keep them that way.4. Techni Ice reusable dry ice packs / gel packs can also be cut to size, between the individual cells, to fit your application.5. If you are going away for an extended period, turn your freezer to maximum freeze(approx. -0.4°F) for 3 or 4 days before departing. Unlike water ice, Techni Ice reusable dry ice packs / gel packs being an industrial refrigerant, will maintain temperatures beyond -13°F. The lower the temperature Techni Ice reusable dry ice packs / gel packs are frozen at, the longer it stays frozen...Hope this helps, and enjoy your trip!

how many sheets come in a package

6 sheets come in the package. Each sheet contains 24 individual cells. Thank you.

How big and thick are the individual cells? Need them to go in a small insulated pouch for an injectable med. thanks!

Each cell is about two inches square . When frozen (ie fully expanded) they are about 5/8 of an inch thick .

Do the products you received have the new muti colored printed cells or are they the classic blue and white printed cell?How many cells are in a pack?

Classic blue, and white.24 cellsMeasures: 40cm x 28cm15 5/8 " x 11"

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♻️ Chill, Heal, Repeat — The ultimate reusable ice & heat pack for the modern multitasker!

FOOD SAFE VERSATILITY - Perfect for coolers and food storage, keeping your perishables fresh and safe ❄️
ENDLESS CHILL WARMTH - Reusable 4-ply sheets designed for hundreds of uses, saving you money and waste ♻️
LIGHTWEIGHT PORTABLE - At just 397g, these sheets are easy to carry and perfect for busy professionals on the move 🚀
ATHLETE APPROVED RECOVERY - Engineered to soothe sore muscles and speed up injury healing, your post-workout essential 💪
LONG LASTING TEMPERATURE CONTROL - Maintains cold or heat for extended periods, ideal for on-the-go recovery 🔥

The Techni Ice HDR 4 Ply Reusable Ice & Heat Packs offer a durable, food-safe solution for both cold and heat therapy. Designed with 4-ply technology, these lightweight sheets maintain temperature for long periods and can be reused hundreds of times, making them perfect for muscle recovery, injury treatment, and keeping food fresh in coolers.

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