Yes, vapes almost always set off metal detectors. The lithium battery, heating coil, and metal casing inside every vaping device — including disposables like Elf Bar and Lost Mary — contain enough metal to trigger walk-through detectors and handheld wands. At airports, place your vape in the bin with phones and keys. At schools and concerts, expect your device to be flagged. Here's exactly what happens and how to get through security without hassle.