Head to headWeight6 min read8 sourcesIn the back pocketShampoo Bars vs Refillable Travel Bottles: Cost per Wash and Airport Liquid RulesA shampoo bar is a solid, so it stays out of the liquids bag on every route. That is its main advantage. A refillable silicone bottle lets you bring the shampoo you already use. The catch is that it counts toward liquid limits, and a 100 ml…InsideThe short answerWhat airports allow in your cabin bagWhat each costs per washCapacity: how many washes fit in your bagRead the guide →