Vacuum Flasks & Thermos

Flask or thermos – what is the difference?

A thermos is a vacuum flask: two steel walls with the air removed between them. Without air, heat cannot move in or out, so hot drinks stay hot and cold drinks stay cold. Our 750ml flask uses this double-wall vacuum design in 304 stainless steel.

Why a 750ml flask

• Slim – fits a handbag, laptop bag or car door pocket.
• Hot 12 hours – morning tea is still hot in the afternoon.
• Cold 24 hours – iced water through the hottest part of the day.
• Leak-proof lid – safe to carry lying down in a bag.
• No sweating – the outside stays dry and cool to hold.

Seven colours

Black, Red, Green, Pink, Dark Pink, Navy Blue and Ocean Blue – easy to tell apart when the whole family has one.

Where it works best

Office desks, winter camping in the desert, early school runs, long flights and Friday picnics. Many customers keep one flask for coffee and a second one for cold water.

Care

Rinse with warm water after hot drinks, wash by hand with mild soap and let it dry open. Do not use bleach, and do not put the flask in the microwave or freezer.

Need more capacity? See the 1 litre water bottle or all water bottles.

Frequently Asked Questions

Q1: How long does the vacuum flask keep tea hot?

Up to 12 hours. For the best result, rinse the flask with hot water first and fill it to the top.

Q2: Is a thermos the same as a vacuum flask?

Yes. Thermos is a common name for a vacuum flask – a bottle with two walls and a vacuum between them that stops heat moving in or out.

Q3: What size is the ZeroSpace flask?

It holds 750ml, which is about three cups of tea or coffee, in a slim body that fits most bags.

Q4: Can I carry the flask lying down in my bag?

Yes, the lid is leak-proof. Always close it firmly, especially with hot drinks.

Q5: Which colours are available?

Black, Red, Green, Pink, Dark Pink, Navy Blue and Ocean Blue.