The phrase "bottle brush" refers to a type of cleaning tool that has bristles shaped like a brush and a long, slender handle. It is commonly used to clean the inside of bottles or other narrow spaces. Full definition
Apparently I share the love of bottle brush trees with you... lol. (inspiredbycharm.com)
I already have dozens upon dozens of bottle brush trees in storage, so it was a matter of choosing the colors I wanted to use. (penniesfromheavenhome.com)
Did I mention how much I love bottle brush trees? (fynesdesigns.com)