Mug flask that keeps tea warm for a long time!

[Cognac87654]

Must be indestructible with cord to
attach to a bike!

Would be extremely grateful for any recommendations please.

Anyone please?

@Cognac87654 not sure how helpful this is

https://www.bikeradar.com/features/opinion/thermal-bike-coffee-cup

but I was thinking about this recently, but haven't done anything about it.

I have an e bike but the frame/ battery leaves no room for attaching a bottle cage. I think my only other option is changing my rucksack to one that has space for a bottle attachment, but I am not sure it wouldn't come out again.

Very sorry for the delay in replying Goodcat and thanks very much for that link! I thought I had posted in response to yours, but obviously forgot to press send.

I appreciate the info; thanks again.