Wide opening makes filling easy and in the dishwasher it is perfectly clean and can be easily cleaned with a soft nylon brush (goes with the metal bottles from Switzerland not so easy; o). The shutter can be operated with one hand - so perfect for traveling. It is not as hard as a glass bottle, and takes no smell / taste like the remaining plastic colleagues. 1/3 juice with 2/3 medium-sprudeligem water holds tight, unless they really filled only up to the 700ml mark and not shaking all too wild.