This is where it gets interesting. You can bring a full water bottle or a coffee cup through security. But—and it’s a big “but”—you must drink from it or pour it out right there in front of the guard.
Think of it as a magical, live-action taste test. They just want to see it flow. It’s a bit like a strange, modern party trick: “Here, watch me sip this lukewarm tea to prove it’s not a bomb.”
Once you’ve taken a sip, you’re good to go. You can keep the bottle and drink it on the train. It’s a great excuse to enjoy your overpriced station coffee before you board.
Eurostar Liquids: What You Can Bring & Restrictions | ZadRails
