Descriptions: This kind of sous vide water balls are reusable and very helpful for reducing heat loss and water evaporation, they will become a good helper for you to use in household cooking. （compatible with multiple shapes and sizes of containers and professional sous vide cooking equipment.）Features: 1. Preventing heat loss effectively: It can help reduce heat loss and water evaporation, keep your food in good condition and tasty.2. No need to refill water uninterruptedly: These water cooking balls can be cooked without refilling water for several hours, convenient to use.3. Reusable: This kind of sous vide water ball can be reused again and again, providing you a long service life.4. Easy to store: You will get 250pcs balls and a mesh bag which is for you to store them and keep them clean, they are easy to store and clean.Specification: Product name: sous vide cooking water ballsMaterial: pp Size: diameter 20mmPacking list: 1 bag sous vide cooking water balls(250pcs in total)