During long sous vide cooks, water evaporates from the surface of the container, lowering the water level and making the circulator work harder to maintain temperature. These polypropylene balls (ø20 mm) form a covering layer on the surface, reducing evaporation and heat loss and keeping the water level stable. They also help keep sous vide bags submerged when the contents tend to float.
Rated up to 110°C. Supplied in a bag of 500.