The Airport Security Tamper Evidence Bag, also known as the ICAO Security Tamper Evidence Bag (STEB) or duty-free shop anti-theft shopping bag, is a special bag for liquids, aerosols and gels (LAGs) sold at airport duty-free shops to ensure supply chain security. And comply with all relevant requirements of ICAO.
These bags are usually made of transparent materials and have sealing mechanisms, such as heat sealing or tape with obvious signs of opening, to prevent unauthorized access.