A stainless vacuum flask 280ml is a type of flask that uses vacuum insulation to keep liquids hot or cold for long periods of time. It is made of stainless steel, which is a durable and rust-resistant material. The flask has a double-walled construction, with a vacuum between the walls. This helps to prevent heat or cold from transferring through the walls of the flask.

Stainless vacuum flasks are often used to keep coffee, tea, or other hot beverages hot for hours. They can also be used to keep water cold for long periods of time, making them a popular choice for hikers and other outdoor enthusiasts.

Here are some of the key features of a stainless vacuum flask 280ml:

• Double-walled vacuum insulation: Keeps liquids hot or cold for long periods of time.
• Stainless steel construction: Durable and rust-resistant.
• Leakproof: Prevents liquids from leaking out.
• BPA-free: Safe for use with food and beverages.
• Dishwasher safe: Easy to clean.