The key to sous vide cooking is maintaining a precise water temperature. This Anova sous vide container boasts a patented design for optimal water heating and circulation flow, so it produces perfect restaurant-quality results every time. The large-capacity vessel includes a rack to prevent sealed bags from floating, plus a lid with a rubber seal that helps retain heat. For use with all Anova Precision Cookers. Patented Hemiflow design features smooth, curved edges to help water circulate more efficiently and heat water quickly. Lid with rubber seal locks in heat to retain precise cooking temperature. Removable cooking rack keeps food positioned and submerged during cooking. Unique 3mm raised base protects surfaces from prolonged heat exposure - even without a trivet. Made of food-safe polycarbonate plastic. Dishwasher safe.