I have one of these https://www.amazon.co.uk/Sigg-8581-8-Bottle-Cold-Brushed/dp/B017IJF3AM/ref=sr_1_9?ie=UTF8&qid=1509231761&sr=8-9&keywords=hot%2Bcold+flask
it's pretty good. not sure i'd trust the seal to be rolling around in a bag but if you're keeping it upright it's great.
keeps temperature so well I have to let it cool down before drinking even if it's been hours since I filled it.
found it after seeing it's the one that square mile have rebadged for their own version (at £32!)
https://shop.squaremilecoffee.com/products/sigg-flask
@HatBeard started
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I have one of these https://www.amazon.co.uk/Sigg-8581-8-Bottle-Cold-Brushed/dp/B017IJF3AM/ref=sr_1_9?ie=UTF8&qid=1509231761&sr=8-9&keywords=hot%2Bcold+flask
it's pretty good. not sure i'd trust the seal to be rolling around in a bag but if you're keeping it upright it's great.
keeps temperature so well I have to let it cool down before drinking even if it's been hours since I filled it.
found it after seeing it's the one that square mile have rebadged for their own version (at £32!)
https://shop.squaremilecoffee.com/products/sigg-flask