Dyn-A-Dish Weighing Boats by Dyn-A-Med are disposable and lightweight with a stable, flat bottom and turned, non-slip gripping edge. These weigh dishes are easier to manipulate than unwieldy papers or heavy glass or porcelain labware. Thin, no-wetting, polystyrene is unaffected by inorganic solutions and is ideal for handling dry or liquid samples.They are flexible and can be squeezed for controlled pour off. Polystyrene. MPN 80050, 80055, 80060. SKU D850, D855, D860.