QUALITY AND NATURE MATERIAL: Made of 100% Boar bristles, free from foreign smell, safe to clean.;ANGLED TIP DESIGN: The curved end makes it very easy to get the sides and corners.Ideal for clean sports bottle, long cups, vases, vacuum cup, kettles, blenders, coffee pot and travel tumbler.It's only limited by your imagination!;DURABLE AND FINE BRISTLES: Easily scrub away food, stains and dirt, clean thing's walls without scratching.: If you do not love your Amazer Water Bottle Brush, return it, and we'll give 100% of your money back, or replace it if there was a problem with the brush.;Long bottle brush is perfect for cleaning the inside of bottles with narrow necks