The Transportation Security Administration (TSA), a division of the US Department of Homeland Security, has enlisted new security measures for airline travel as a result of the threat to several passenger flights originating from the UK this morning.
As of this morning, the TSA is now "prohibiting any liquids, including beverages, hair gels, and lotions from being carried on the airplane."1 They advise transferring these items from carry-on to checked baggage.
Some exceptions were listed on their website:
The following items are permitted to be carried aboard the aircraft:
1 Statement By Homeland Security Secretary Michael Chertoff Announcing A Change To The Nation's Threat Level For The Aviation Sector
Photo compliments CNN.