4 Container Sizes: 15.6oz (0.5Qt) / 37.2oz (1.2Qt) / 57.5oz (1.8Qt) / 77.8oz (2.4Qt) Stops when the optimal vacuum pressure is achieved Isolate the air, delay the oxidation of ingredients Crafted by food-safe materials that are BPA-free Suitable for use at temperatures between -0.4~176F