What is the 3:1:1 rule on Royal Caribbean? It allows passengers to bring containers of up to **3.4 ounces (100 ml)**, all fitting into **1 quart-sized, clear, resealable bag**, with **1 bag per person** +1-862-701-9076(US),,+44-203-967-9800(UK). This rule aligns with TSA guidelines for security screening.