Review on 🧼 Efficiently Clean Tight Spaces with RuiLing Long Grip Bottle Brush for Water Bottles, Cups, Carafes and More by Crystal Velar

My metal travel coffee mug is long and narrow. I can't get my hand in to clean it and it's longer than most bottle brushes to really get to the bottom. This brush works well. It flexes a bit when I try to push the brush down to scrape the floor and remove debris, but so far this is the only brush I've found that fits into a narrow opening and is still big enough to clean them. I wanted a stiff wire brush like the grill brush, but the heads were too wide to fit in the mug. It seems to work well as far as I'm looking for a brush with firmer bristles.