Three-dimensional cleaning Bionic spiral flocking, 360-degree cleaning without residue, can reach any corner of the kettle or cup, quickly clean up stains, bring you powerful cleaning power, and allow strong scrubbing. *NOTE*: NOT suitable for cleaning containers with mouth diameter LESS THAN 2 inches Innovative L-Shaped Brush Head Perfect for cleaning glassware, travel mugs, drinking glasses, feeding bottles, wine glasses, sports bottles, decanters, coffee pots and other containers, just one brush Selected brush wire The L-shaped brush head is made of upgraded nylon material, the bristles are moderately soft and hard, do not hurt the cup, no scratches, no traces, the handle is firm and durable Easy to wash The cleaning brush is wrapped with a stainless steel cloth, and the sticky substance on the bristles is easy to wash off and does not hide stains