Microcore - 110.90.03520 - 5 in x 7 in Microcore Hot/Cold Pack

SKU: 81492
Price: $7.64/ea
Shipping Info: Stock item, same day shipping M-F

5 in x 7 in Microcore Hot/Cold Pack Features

  • Easily heated in your microwave or cooled in your refrigerator or freezer
  • Re-usable
  • Safer than gel
  • Filled with non-toxic liquid
  • Microcore Hot/Cold packs distribute the heat or cold evenly
  • Can be placed in any type of container for continued heating or cooling
  • One year limited warranty
  • 3 years or 300 use lifespan
  • Maximum Heat time 1000 watt or less 3 min 45 sec
  • Maximum Heat time over 1000 watt 2 min 30 sec

Very Disappointed


Was very disappointed when I received two, put directly in the freezer before I found out that one had a hole in it and leaked in my freezer. Con not use has to be thrown out.

Cosmo Bailey

Knoxville, TN


Fabulous cold retention


We've ordered many of these packs over the years--very reliable and last forever--it's just that we end up giving them away to people who love them too--so have to reorder. Our only disappointment w/recent orders-- In the past, even when they were frozen, they were soft and pliable--thus great as backup exercise cool packs. However, the latest version is absolutely solid when frozen--so we can only use them for use in our food coolers. And because they are so solid, they are not so easily "shifted" around the food. That said, we would never consider buying any other product for this use.


San Jose CA, USA and San Jose BCS Mexico



Works well to keep bread warm, I'm glad I ordered it.


Pembroke Pines, FL

I would have preferred ...


I would have preferred the Microcore pack to have included basic instructions--I had to call the 800 number on the pack.



5 in x 7 in Microcore Hot/Cold Pack

4.0 4


Does it come with a cover?


No, It did not come with a cover. Sent from my iPad


This does not come with a cover.


No cover.  Comes as pictured.  Great product!   No cover.  Comes as pictured.  Great product! ###- Please type your reply above this line -### Can you answer Peggy's question about this product? 5 in x 7 in Microcore Hot/Cold Pack "Does it come with a cover?" Simply Reply to this email Thank you in advance if you are able to answer the question. Your email address will not be shared with this customer or other shoppers. We may post your answer to our site to benefit other shoppers. By replying to this email you agree to the privacy Unsubscribe from answering questions about all products


How do you heat this item in a micro wave. What setting, how long?


It can be heated on regular setting for 3 minutes and 45 seconds for microwaves with 1000 watts or less. For microwaves over 1000 watts 2 minutes and 30 seconds.

Community Answer

how long will this product keep food hot?

This Microcore hot/cold pack will stay hot for about an hour or two depending on how well insulated the carrier is.


4-6 hours

How thick is this hot pack?

This hot/cold pack is approximately 1" thick.