Double Wall Wide Mouth Insulated Vacuum Flask

The capacity, materials and performance figures on this page are the supplier's, not an independently tested manufacturer specification. We have marked them as supplier figures in the table rather than present them as verified. If a number matters to your decision, ask us and we will measure or weigh the item in the shop before you buy.

In a Dar office, cold water with ice in the morning is still cold in the afternoon, as long as you are not opening it constantly. Every opening lets warm air in, and a half-empty flask loses temperature faster than a full one.

Because the vacuum between the two walls stops the cold reaching the outer skin. That is what saves your desk, your papers and the inside of your bag.

Yes, and it will hold heat well. Wash it thoroughly afterwards, because coffee oils and a straw lid together will hold a taste.

With the thin brush that suits a straw, not just a rinse. A straw left unwashed in this climate grows a film within days.

Hand wash is safer. Dishwasher heat and detergents dull the finish and can shorten the life of the vacuum seal.

That means the vacuum has failed, usually after a hard knock that dents the inner wall. There is no fixing it, which is why it is worth not dropping.

Not with a straw lid. Pressure builds and forces the drink up. Use a sealed lid for anything carbonated.