kettle -
To contain demonstrators in a confined area.
Wikipedia
A kettle, sometimes called teakettle, tea kettle or the pot, is a small kitchen appliance used for boiling water in preparation for making tea or other beverages requiring hot water. Kettles often resemble teapots, but are used to boil water, not to brew tea. Kettles can be heated either by placing on a stove, or by their own heating element.
OmegaWiki Dictionary
Ω
kettle A metal container used to boil water.
kettle A metal container used to boil any kind of liquid.
kettle A metal container used for boiling water for tea.
