It ensures easy and proper cleaning of products like thermos and kettle, which are not suitable for machine washing, without causing damage, thanks to the brush profile that adapts to the current shape and bristles of suitable stiffness. The sponge unit ensures perfect cleaning at the base of the thermos and in hard-to-reach areas. There is a hanging hole on the handle of the brush for you to hang it after use. WARNINGS! Wash and clean before first use and after each use. Please do not clean thermos brushes by boiling them in water or washing them in the dishwasher. Ensure the brushes dry in a well-ventilated area after the cleaning process. Never use bleach during cleaning.