Categories Posted inin Travel How Much Liquid Can You Take on a Plane? The 3-1-1 Rule ExplainedPosted byby dailytripadvicesSeptember 24, 20260 Comments5 min A practical breakdown of the 3-1-1 liquids rule at US checkpoints, what security actually counts as a liquid, the medical and duty free exemptions, and the growing list of UK airports that have replaced the 100 ml cap with a 2 litre limit.