Vacuum Flask Online — Double Wall Insulated Stainless Steel Water Bottles by Probott

A vacuum flask earns its name from what happens inside the wall, not what's printed on the outside. Between two layers of stainless steel sits a sealed, air-removed gap — the actual mechanism that keeps your coffee hot at 11 am and your water cold at 4 pm. Probott's vacuum flask collection is built entirely around that principle, spanning 87 products from a 250ml compact flask you can slip into a small bag to a 1,500ml bottle meant to carry you through an entire workday.

Key Takeaways

• The collection spans 13 capacities, from 250ml to 1,500ml, with the highest-priced flask at ₹1,549.
• Core lines include Handy (1100ml/1500ml), Trendy (480ml/700ml), Elegant (500ml), Aquatic (500ml), Bang (600ml/750ml), Companion (500ml), Swift (500ml wide-mouth), Bloom (680ml), Compact (250ml), and Drops (500ml).
• All flasks use double-wall vacuum insulation and BPA-free stainless steel.
• Cap styles vary by line: push-button flip-top (Bloom, Bang), wide-mouth flip-top (Swift), and standard screw caps (Handy, Trendy, Elegant).
• Discounts across the collection range from 9% to 27% off listed regular price.

How a Stainless Steel Vacuum Flask Actually Works

A double-walled insulated flask has two steel walls with the air pumped out of the gap between them. Heat needs a medium to travel through — air, liquid, or solid contact — so removing that air stops most heat transfer by conduction and convection. That's the entire mechanism behind why a thermos flask holds a cup of tea near its original temperature for hours, without batteries or electricity involved.

Vacuum Flask vs. Single-Wall Bottle

A single-wall steel bottle has no insulating gap, so it equalises quickly with room temperature — fine for cold water on a short commute, but useless for keeping tea hot past the first hour. A vacuum insulated water bottle is the right choice whenever temperature retention matters more than just carrying liquid.

Choosing the Right Flask by Capacity and Use

For desk and short commutes (250ml–500ml): The Compact 250ml and Elegant/Aquatic/Companion 500ml lines suit single-serving hot drinks or a half-day's cold water without adding bulk to a bag.

For gym and sports carry (600ml–750ml): The Bang and Bloom ranges, with push-button flip-top caps, are built for one-handed access during activity.

For full-day or shared use (1100ml–1500ml): The Handy 1100ml and 1500ml flasks work for professionals who refill once a day or for sharing across a small team or family.

A thermosteel flask — Probott's term for its vacuum-sealed steel construction — appears across nearly every line in this collection, from the Compact 250ml to the Handy 1500ml.

Benefits of a Stainless Steel Flask for Daily Use

• Long-lasting temperature retention — hours of hot or cold performance without external power.
• BPA-free, food-grade steel — safe for repeated daily beverage contact.
• No odour retention — unlike some plastics, steel doesn't absorb coffee or tea smell over time.
• Durable, drop-resistant build — steel construction handles daily bag and desk use better than most alternatives.
• Capacity range for every routine — from a 250ml solo coffee flask to a 1,500ml all-day bottle.

Features Across the Vacuum Flask Range

• Double-wall vacuum insulation for extended hot-and-cold retention on every product.
• Push-button flip-top caps for one-handed use (Bang, Bloom).
• Wide-mouth flip-top caps for easier filling and cleaning (Swift).
• Standard screw caps for tighter bag-carry sealing (Handy, Trendy, Elegant, Companion).
• BPA-free stainless steel body across the full collection.
• Multiple finishes and colourways per line, refreshed with regular new launches.