Thermos® Stainless Steel Vacuum Insulated Flask 500ml – Double-Wall Thermal Bottle

Brand: Thermos®
Product Type: Vacuum Insulated Flask
Capacity: 500ml
Body Material: 18/8 Stainless Steel
Insulation: Airless Vacuum Between Double Walls
Lid Material: BPA-Free Polypropylene
Gaskets: Food-Safe Silicone Rubber
Design: Double-Wall Thermal Bottle
Suitable For: Hot & Cold Beverages

The Thermos® Stainless Steel Vacuum Insulated Flask 500ml

 is a compact thermal bottle designed to help maintain the temperature of hot and cold beverages throughout the day. Made from durable 18/8 stainless steel with airless vacuum insulation, it features a BPA-free polypropylene lid and food-safe silicone gaskets for secure sealing. Its 500ml capacity makes it ideal for work, school, commuting, travel, and everyday hydration.

Introduction

The Thermos® 500ml Stainless Steel Vacuum Insulated Flask combines durable construction with reliable thermal performance in a convenient, portable size. Its 500ml capacity provides enough space for an individual serving of coffee, tea, water, or another beverage while remaining easy to carry.

The flask features 18/8 stainless steel, containing approximately 18% chromium and 8% nickel, which provides good durability and resistance to rust and corrosion. Airless vacuum insulation between the inner and outer steel walls helps minimize heat transfer and maintain beverage temperature. The BPA-free polypropylene lid and food-safe silicone gaskets provide a secure closure for everyday use.

Key Materials Overview

18/8 Stainless Steel

The bottle is made from 18/8 stainless steel, containing approximately 18% chromium and 8% nickel. This material is valued for durability and resistance to rust and corrosion.

Airless Vacuum Insulation

The space between the inner and outer steel walls is evacuated to minimize heat transfer, helping beverages retain their temperature for longer.

BPA-Free Polypropylene Lid

The lid is made from BPA-free polypropylene plastic, providing a durable and practical closure for everyday beverage use.

Food-Safe Silicone Gaskets

Silicone rubber gaskets help create a secure seal around the lid and reduce the risk of leakage when properly closed.

Comparison Section

Thermos® 500ml Flask vs 350ml Thermos Flask

The 500ml flask offers greater capacity while remaining compact, making it suitable for users who want more hydration between refills. A 350ml flask is more compact and better suited to a single smaller serving.

Thermos® 500ml Flask vs 700ml Thermos Bottle

The 500ml model provides a balance between portability and capacity, while a 700ml bottle is better suited for longer periods between refills.

Thermos® 500ml Flask vs Regular Water Bottle

The Thermos® flask uses vacuum insulation to help maintain beverage temperature, whereas a conventional non-insulated bottle generally provides little temperature retention.

Health Boutique Expert Insight

A 500ml vacuum-insulated flask is a versatile size for everyday use because it provides more capacity than a compact 350ml flask without becoming as bulky as larger bottles. Stainless steel offers durable construction, while vacuum insulation reduces temperature transfer. Regular cleaning of the lid and silicone gasket is important for maintaining hygiene and sealing performance.

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💙 A durable 500ml vacuum-insulated flask designed to help keep your favorite hot or cold beverages at the desired temperature wherever you go.

Convenient 500ml capacity.
Durable 18/8 stainless steel construction.
Double-wall vacuum insulation.
Airless vacuum space helps reduce heat transfer.
Helps maintain hot and cold beverage temperatures.
BPA-free polypropylene lid.
Food-safe silicone sealing gaskets.
Compact and easy to carry.
Suitable for work, school, commuting, and travel.
Reusable alternative to disposable beverage containers.

Why Customers Choose This Product

The Thermos® 500ml Flask offers a practical combination of stainless steel durability, vacuum insulation, and portable capacity, making it suitable for carrying temperature-controlled beverages throughout the day.

Who Is It Suitable For?

Office workers.
Students.
Commuters.
Travelers.
Gym and fitness users.
Coffee and tea drinkers.
Anyone looking for a compact insulated bottle.

Who May Prefer Another Product?

Those who need enough water for extended periods without refilling may prefer a larger 700ml–1.1L insulated bottle or travel mug.

Wash the flask and lid before first use.
Fill with your preferred hot or cold beverage.
Avoid overfilling.
Secure the lid firmly.
Check that the silicone gasket is correctly positioned.
Keep the bottle upright whenever possible during transportation.
Clean the bottle, lid, and gasket thoroughly after use.
Follow the manufacturer's care instructions.

18/8 Stainless Steel, Airless Vacuum Insulation, BPA-Free Polypropylene Lid, & Food-Safe Silicone Gaskets

What is the capacity of the Thermos® flask?

The flask has a 500ml capacity.

Is it made from stainless steel?

Yes. The body is made from durable 18/8 stainless steel.

What does 18/8 stainless steel mean?

It generally refers to stainless steel containing approximately 18% chromium and 8% nickel, a composition valued for durability and corrosion resistance.

Does it have vacuum insulation?

Yes. It uses an airless vacuum space between the inner and outer steel walls.

Is the lid BPA-free?

Yes. The lid is made from BPA-free polypropylene plastic.

Are the gaskets food-safe?

Yes. The sealing gaskets are made from food-safe silicone rubber.

Can it hold hot beverages?

Yes. The vacuum-insulated construction is suitable for hot beverages such as coffee and tea.

Can it hold cold beverages?

Yes. Vacuum insulation also helps maintain cold beverage temperatures.

Is 500ml a good everyday size?

Yes. It provides a practical balance between portability and beverage capacity for work, school, commuting, travel, and daily hydration.

How should I clean the flask?

Clean the stainless steel body, lid, and silicone gasket thoroughly after each use. Follow the manufacturer's care instructions for proper cleaning and drying.

How does a vacuum-insulated flask work?

The bottle has an airless space between its inner and outer walls. This greatly reduces heat transfer and helps beverages maintain their temperature for longer.

Is 500ml enough for daily use?

For many users, yes. 500ml is a convenient individual capacity that provides useful hydration while keeping the bottle relatively compact.

Is 18/8 stainless steel suitable for drinkware?

Yes. 18/8 stainless steel is widely used in drinkware because of its durability and resistance to corrosion.

Can I use the Thermos® 500ml flask for coffee?

Yes. The vacuum-insulated design is suitable for coffee, tea, water, and other appropriate beverages.

What is the purpose of the silicone gasket?

The silicone gasket creates a sealing barrier between the lid and bottle, helping reduce leakage when the lid is properly secured.

Is the Thermos® 500ml flask suitable for everyday use?

Yes. Its durable stainless steel construction, compact capacity, vacuum insulation, and secure lid make it suitable for work, school, commuting, travel, and everyday hydration.

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