Originally Posted by Points Scrounger
Allow me to help confuse you even more ...
I believe that non-Rx eyedrops are allowed in whopping 4 ounce containers! Grandfathered in prior to The Baggie Act. Thus, containers of 3.1 - 4.0 oz cannot be summarily jettisoned by "officers" as "TOO BIG!" (much as some might itch to do so).
At IAD they are "allowing" you to go back and put 4 oz contact solution in your checked luggage, or disposing of it; they are saying 3oz is the limit in the 1 qt bag.