Definition

1. Noun:
   • Thermos flask / Thermos bottle: A vacuum-insulated container, typically cylindrical with a stopper, used to keep liquids like water, tea, or coffee hot or cold for an extended period. The term is a compound of "bình" (bottle, container) and "thủy" (water).

Usage Examples

• Noun:
  • Mẹ tôi thường đổ đầy trà nóng vào bình thủy để mang đi làm. (My mother often fills a thermos flask with hot tea to take to work.)
  • Trên chuyến đi dã ngoại, chúng tôi mang theo một bình thủy nước lạnh. (On the picnic, we brought a thermos bottle of cold water.)
  • Chiếc bình thủy này giữ nhiệt rất tốt. (This thermos flask retains heat very well.)

Advanced Usage

• The word "bình thủy" is a generic term in Vietnamese. The brand name "Thermos" is also commonly used and understood to refer to the same item.

Variants and Related Words

• Phích (nước): A more colloquial and common synonym for "bình thủy," also meaning thermos or vacuum flask.

  • Mua cho bà một cái phích mới. (Buy grandmother a new thermos.)

• Bình giữ nhiệt: A modern term meaning "heat-retaining bottle," often used for insulated flasks and tumblers that may not have a traditional glass vacuum interior.

  • Anh ấy luôn mang bình giữ nhiệt đựng cà phê. (He always carries an insulated bottle containing coffee.)

Synonyms

• Vacuum flask: A bottle with a double-walled container with a vacuum between the walls to prevent heat transfer.
• Insulated bottle: A container designed to maintain the temperature of its contents.

Related Idioms

• There are no common idioms specifically using the term "bình thủy." Its usage is literal, referring to the physical object.

1. Thermos flask, thermos bottle