bình thuỷ
Definition
- Noun:
- Thermos / Vacuum flask: A container, typically cylindrical with a stopper, designed to keep liquids hot or cold for an extended period by using a vacuum between its double walls to minimize heat transfer.
Usage Examples
- Noun:
- Mẹ rót nước sôi vào bình thuỷ. (Mother poured boiling water into the thermos.)
- Bình thuỷ giữ trà nóng cả ngày. (The vacuum flask keeps tea hot all day.)
- Anh ấy mang theo bình thuỷ đựng cà phê khi đi làm. (He brings a thermos of coffee to work.)
Advanced Usage
- The term "bình thuỷ" is a compound word derived from "bình" (bottle, container) and "thuỷ" (water), literally meaning "water bottle." Its specific modern meaning comes from the brand name "Thermos," which became genericized.
Variants and Related Words
- Phích (nước) (n): A more common, colloquial synonym for "bình thuỷ," also meaning thermos or vacuum flask.
- Bình giữ nhiệt (n): A descriptive term meaning "heat-retaining bottle," often used for modern insulated flasks.
Synonyms
- Thermos: A proprietary name that has become a common term for a vacuum flask.
- Vacuum flask: The technical term for the insulating container.
- Insulated bottle: A general descriptive term.
Notes on Usage
- "Bình thuỷ" is considered slightly more formal or technical than the everyday word "phích." Both words are widely understood and used interchangeably.
- It refers specifically to the container designed for thermal insulation, not a regular water bottle.