You can take the coldpacks. Below is the relevant excerpt from the TSA website (<a target=_blank class=ftalternatingbarlinklarge href="http://www.tsa.gov/travelers/airtravel/prohibited/permitted-prohibited-items.shtm)
">http://www.tsa.gov/travelers/a...rohibited-items.shtm)
</a>
"...To ensure the health and welfare of certain air travelers there are no limits on the amounts of the following liquids, gels and aerosols you may carry through a security checkpoint:
Baby formula and breast milk if a baby or small child is traveling;
All prescription and over-the-counter medications (liquids, gels, and aerosols) including KY jelly, eye drops, and saline solution for medical purposes;
Liquids including water, juice, or liquid nutrition or gels for passengers with a disability or medical condition;
Life-support and life-sustaining liquids such as bone marrow, blood products, and transplant organs;
Items used to augment the body for medical or cosmetic reasons such as mastectomy products, prosthetic breasts, bras or shells containing gels, saline solution, or other liquids; and,
<b>Gels or frozen liquids needed to cool disability or medically related items used by persons with disabilities or medical conditions.</b>
You are not limited in the amount or volume of these above items you may bring in your carry-on baggage. However, if these items are in containers larger than three ounces, please perform the following:
Separate these items from the liquids, gels, and aerosols in your quart-size and zip-top bag.
Declare you have the items to one of our Security Officers at the security checkpoint.
Present these items for additional inspection once reaching the X-ray. These items are subject to additional screening.