The balls come packed in a practical hanging net. The balls dry quickly in the net and it can be cleaned. The Lauben Sous Vide Balls are 100% BPA free and are therefore completely harmless.
For best results, the entire surface of the water should be covered (with partial coverage, the efficiency of the bath increases). A pack of 50 pcs is optimal for a pot with a diameter of about 17 cm. For the most common pot sizes around 20 - 30 cm we recommend 2 - 3 packs.