Time-controlled color-changing filaments signal toothbrush head wear, helping users replace brushes before cleaning effectiveness declines.
A filter, priming chamber, and annular flow restrictor plate keep sunscreen powder flowing evenly while reducing clumping, clogging, and streaking.
A gravity-fed idle roller applies disinfectant continuously to moving escalator handrails without power, bulky equipment, or retrofit work.
Upper and lower indentations let the brush hang inside a paint can, keeping it upright and reducing paint overload and spillage.
A vent tube with distributed apertures and capillary feed balances air pressure to prevent fluid leakage in any orientation.
Hydrophobic vent apertures equalize storage-cavity pressure while capillary delivery continues without unwanted fluid leakage.