It's the rule for getting liquid/gel items through security.
I took this from the Jetblue website, but I imagine all the airlines have the same info:
"Information on the 3-1-1 Directive
3-1-1 for carry-on baggage = 3 oz bottle or less; 1 quart-sized, clear, plastic,
zip-top bag; 1 bag per Customer placed in screening bin. One-quart bag per person
limits the total liquid volume each traveler can bring. 3 oz container size is a
security measure.
Customers are prohibited from taking liquids, gels, and/or aerosols past the airport
security screening checkpoint EXCEPT:
one clear transparent, resealable 1 quart (1 liter) size plastic bag containing
liquids, gels, and aerosols in travel size containers (3 oz. capacity)
or less per container.
The contents of the plastic bag must fit comfortably and the plastic bag must
be completely sealed, be taken out of the carryon bag and placed in a security
bin
Please note: liquids, gels, and aerosols include beverages, shampoo, suntan
lotion, creams, toothpaste, hair gel, hair spray, and other items of similar
consistency.
Liquid Exemptions (exempt items more than 3 ounces)
Customers may have the following items, but must declare them to TSA at the
security checkpoint if the items are not contained in a clear transparent resealable
1 quart (1 liter) size plastic bag and/or the size of the containers exceed travel size
(3 oz):
Baby formula or milk (to include breast milk), baby food and/or juice in
containers if a baby or small child is traveling
Medications (liquid, gel, and aerosol)
Liquids (to include juice) or gels for diabetic or other medical needs
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,
Gels or frozen liquids needed to cool disability or medically-related items used
by persons with disabilities or medical conditions.
Customers may be subjected to a secondary screening if they enter the screening
checkpoint with liquids, gels, and aerosols on their person or in their carryon
bag.
Traveling with Formula, Breast Milk, or Juice
When carrying formula, breast milk, or juice through the checkpoint, customers will be
inspected, however, the customer or their baby or toddler will not be asked to test or
taste breast milk, formula, or juice. The TSA Security Officers may test liquid
exemptions (exempt items more than 3 ounces) for explosives.
When traveling with a child, in the absence of suspicious activity or items, greater
than 3 ounces of baby formula, breast milk, or juice are permitted through the security
checkpoint in reasonable quantities for the duration of the customer's itinerary, if the
customer 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.
Customers are encouraged to travel with only as much formula, breast milk, or juice in
their carry-on needed to reach your destination. "
We are at the 16 day mark ourselves and it just doesn't seem the least bit real that we'll be there in just over 2 weeks
