A small calibre projectile has an outer hollow cylindrical base member and a conical or ogive front region constructed to mushroom upon impact. The exhaust gas sensing system includes a NH3 sensing cell, a NO2 sensing cell, a NOx pumping cell, and a current sensor that detects an electrical current flowing through the NOx pumping cell. The pour spout has a crisp edge for pouring foodstuff when the lid is mounted to the jar. When a credential seed is needed to perform a real-time or near real-time authentication of a One Time Password, the credential is fetched from the pre-active credential seed data store, used to authenticate the OTP and injected into the active credential seed data store, which can be a database. When the frequency is so adjusted and the signals that have traversed the transmission paths are allowed to coherently interfere with one another, then a minimum resultant signal or null is obtained. This invention also provides an expressing vector and a cell produced therefrom.