The top portion which holds bottles and mugs screws on to the expanding base, allowing it to be easily removed and interchanged with other tops for other bottles. Each top is specific to a certain bottle, meaning you can be sure it will work for you.

The adapter was designed to be tightened with significant force against the walls of your cup holder. This in combination with the 27 cm squared rubber surface area across four contact points ensures the adapter will keep your bottle stable while driving.

The expanding mechanism can be operated from the top of the base and is therefore easy to use, even in deep cup holders. Additionally, the knob can be turned with the top on and off.

Unlike many companies, I actually use my products. This adapter has a permanent place in my car, holding my Yeti 46 oz bottle every day.