Does it keep drinks hot and cold?

The double-wall vacuum build slows heat transfer, so hot drinks stay warm for hours and cold water stays cold. There is no published hour rating, so expect typical budget-flask performance rather than all-day retention.

Is the inner steel safe for drinks?

The liner is 304 food-grade stainless steel, the grade commonly used for drinkware. The outer shell is 201 steel, which is fine as the outer layer but less corrosion-resistant if it were the liner.

Can I put it in the dishwasher?

The body is stainless steel, but the PP and silicone parts are best hand washed. Wash the bottle by hand with warm water and mild soap to protect the finish and seals.

What comes in the box?

One 500ml vacuum flask with its screw-on cap. No brush, spare lid or carry sleeve is included.

Will it fit in a car cup holder?

At 7cm across and 26.5cm tall, the rounded body fits most standard cup holders. Check your holder's depth if it is shallow.

Where is the Customizable Stainless Steel Vacuum Flask cheapest?

At Deal.ai, for $16.99, as of our latest check.

Free shipping on everything10% off your first orderNo account needed · Buy 2, save 10% · 3+, save 15%

Customizable Stainless Steel Vacuum Flask

Sold and shipped by Deal.ai

$16.99Free shipping

Buy 2, save 10% · 3+, save 15%

Extra 10% off your first order

Color: White

Arrives about Nov 21 – Dec 1, from a warehouse in China

30-day full refund: if you're not happy with it for any reason, or it never arrives, tell us within 30 days and we refund you in full. Shipping and refunds