Longman Dictionary of Contemporary English
Wiktionary
n. A bottle used for carrying water.
WordNet
n. a bottle for holding water
Wikipedia
A water bottle is a container that is used to hold water, liquids or other beverages for consumption. The use of a water bottle allows an individual to transport, and drink, a beverage from one place to another.
A water bottle is usually made of plastic, glass, sheepskin or metal. Water bottles are available in different shapes, colors and sizes. In the past, water bottles were sometimes made of wood, bark or leather. Water bottles can be either disposable or reusable. Reusable water bottles can also be used for liquids such as juice, iced tea, alcoholic beverages or soft drinks. This water bottle form can help save the environment, through reducing waste.
Easily portable, water bottles make for convenient use, while typically containing nutrition facts and fluid ounces.
Usage examples of "water bottle".
I'd imagined that he'd be standing there in a dressing gown looking woeful, maybe even clutching a hot-water bottle, but he wasn't.