Insulated Water Bottles

Insulated water bottles that keep cold drinks cold for up to 24 hours and hot drinks hot for up to 12. Every SmartFlask is vacuum-insulated stainless steel, leakproof, and BPA-free, in 500 ml and 750 ml. Black Friday deals are on selected bottles, so check the sale price on each one above.

Why Choose an Insulated Water Bottle?

A standard bottle gives up its temperature quickly. In an Australian summer, that means warm water by lunchtime. In winter, it means a lukewarm coffee by the time you reach your desk.

An insulated water bottle fixes that. Fill it in the morning, and your drink will still be the way you want it hours later, whether you’re at the gym, in the car, at your desk, or on the trail. Call it an insulated drink bottle, a thermal water bottle, or an insulated flask; the job is the same: keep the temperature where you put it.

Cold for Up to 24 Hours, Hot for Up to 12

Every SmartFlask is a vacuum-insulated water bottle. Two layers of stainless steel sit either side of a vacuum, so there is no air to carry heat in or out. Cold drinks stay cold for up to 24 hours. Hot drinks stay hot for up to 12.

Results vary with the starting temperature, how often you open the lid, and whether you add ice. The same bottle works as a hot and cold water bottle: iced water in January and tea in July. The outer wall also stays close to room temperature, so a cold bottle sweats far less on your desk, your car seat, and your hands.

Stainless Steel, Leakproof, and BPA-Free

• Food-grade 18/8 stainless steel: it doesn’t hold on to flavours or smells the way plastic can, and it copes with daily knocks.
• Leakproof lid: designed to stay sealed in a gym bag, backpack, or car.
• BPA-free materials: for a bottle you’ll use every day.

Smart Features on Selected Models

Some insulated bottles in the range do more than hold temperature. Selected models include:

• UV-C self-cleaning lid: uses UV-C light to help keep the inside of the bottle clean between washes. See the self-cleaning UV water bottles or read how it works on the SmartFlask technology page.
• Temperature display: check your drink’s temperature without opening the lid.
• Hydration reminders: a nudge to keep drinking through a busy day.

These features are on selected models only, so check the product page for the bottle you’re considering.

Find the Right Insulated Bottle for Your Day

• Gym: cold water through the whole session and a lid that stays shut in your bag. See gym water bottles.
• Travel and commuting: compact enough for a bag or cup holder. See travel water bottles.
• Hiking and camping: cold water that lasts a full day on the trail. See hiking water bottles.
• School: tough, leakproof, and easy to carry. See school water bottles.
• Sipping on the move: try an insulated stainless steel bottle with a straw.
• Office: cold water at your desk and hot tea through back-to-back meetings.

500 ml or 750 ml?

500 ml is lighter and fits most bag pockets and cup holders. It suits commuting, the office, flights, and kids.

750 ml holds more between refills. It suits the gym, hiking, road trips, and long days.

If you’re unsure, 750 ml is the more versatile choice for most adults.

Black Friday Insulated Water Bottle Deals

Black Friday falls on Friday, 27 November, this year, and Black Friday deals are on selected SmartFlask insulated bottles. Savings go up to 60% and show on each bottle, so check the price in the grid before you add to cart.

An insulated bottle is a good Black Friday buy because you’ll use it every day. To make sure the deal is worth it, check:

• Insulation: double-wall vacuum, not a single wall or foam lining.
• Lid: leakproof, so it’s safe in a bag.
• Size: 500 ml for commuting, the office, and flights; 750 ml for the gym, hiking, and long days.
• Features: UV-C self-cleaning, the temperature display, and hydration reminders are on selected models, so choose them only if you’ll use them.

It’s also an easy gift for Christmas since almost everyone drinks water. See more offers in the Black Friday collection or read our Black Friday insulated water bottle guide.

Looking After Your Insulated Bottle

Rinse after each use and wash by hand with warm soapy water and a bottle brush. Hand washing protects the insulation and finish, especially on lids with smart features. Straws, holders, and other add-ons are in the accessories collection.

Shop SmartFlask Insulated Water Bottles

Pick your size and colour above. SmartFlask is Australian-owned, with free shipping over $150. Australia-wide and 4.89 stars from 258 verified reviews. Want to compare every bottle, including the smart models? See the full range.

Frequently Asked Questions

What is an insulated water bottle?

It has two stainless steel walls with a vacuum between them. That slows heat transfer, so cold drinks stay cold and hot drinks stay hot for much longer than in a standard bottle.

How long does an insulated water bottle keep drinks cold?

SmartFlask bottles keep drinks cold for up to 24 hours and hot for up to 12. Actual results depend on the starting temperature, ambient heat, and how often the lid is opened.

Can I use an insulated bottle for hot and cold drinks?

Yes. Double-wall vacuum insulation works in both directions, so one bottle covers iced water and hot coffee or tea.

Are stainless steel insulated bottles safe?

SmartFlask bottles are made from food-grade 18/8 stainless steel with BPA-free materials.

Should I choose 500 ml or 750 ml?

Choose 500 ml for commuting, the office, and flights. Choose 750 ml for the gym, hiking, and long days.

Do all SmartFlask insulated bottles have UV self-cleaning?

No. UV-C self-cleaning, the temperature display, and hydration reminders are on selected models only.

Are insulated water bottles worth buying on Black Friday?

Yes, if the insulation, lid, and size suit how you’ll use it. An insulated bottle gets daily use, so a sale price pays off quickly.