The Marinelli Vessel is a specially shaped silicon container designed for estimation of radiation contamination Cesium-137 in the food products, powders and crushed products, assessing the specific activity in becquerels per kilogram (Bq/kg). Constructed from durable, high-quality silicon, the vessel is both lightweight and robust, with 225ml, weighing just 100 grams with the lid. Its external dimensions 100*60mm, precisely designed to fit compatible Radiacode devices. The snap-on lid ensures secure closure without threads, and although not fully hermetic, the vessel enables effective liquid sample testing—even when inverted—with only minimal risk of leakage during repositioning. Once inverted, the vessel remains reliably sealed, ensuring safe and clean operation. Ideal for home use or fieldwork, the Marinelli Vessel is a useful accessory for anyone concerned about real-time food radiation testing. This functionality is applicable only in the connection of Radiacode devices to its mobile app.