<ul data-eligibleForWebStory="true">Preparing for a family trip, the idea of carrying reusable water bottles to avoid buying plastic ones at the airport arose.Upon suggesting the reusable water bottles, the author's daughter, Sita, raised an important question.The author found themselves reflecting on the question posed by Sita, realizing the significance of her query.The author explained the potential risks of carrying unidentified liquids that resemble harmless beverages at airports.Years ago, individuals attempted to bring dangerous liquids that mimicked water or juice onto airplanes.To counter this threat, airports implemented regulations to differentiate between safe and harmful liquids.