BlenderBottle 2-in-1 Bottle Brush is 2 brushes in 1. The handle twists off to reveal a flexible mini brush to scrub those tough-to-clean straws, spouts & threads on lids. Firm bristles conquer even the most stubborn residue, so you'll never have to worry about today's drink tasting like yesterday's smoothie. Non-slip, comfortable grip provides plenty of traction for tough cleaning action.