Each test in ODV's classic stick NarcoTest Drug Test Kits is self-contained, pre-measured, and hermetically sealed for reliable performance and accurate results. The new polystyrene tubes resist punctures from broken glass ampoules, and the color-coordinated caps provide a tight seal to prevent accidental chemical leakage during use. All stick tests are packaged in a convenient plastic box that prevents damage from sun exposure and rough handling during use and storage. Each test comes packaged with its own set of instructions.