Ah, ok. Mine are the Reflect 800ml bottles. Nice things, ridiculously expensive, but lovely. I’d dearly like one of the big insulated versions but daren‘t browse for fear of justifying a non existent need. You know how it goes...That’s mine
That’s conclusion I came to ,started using the 1l for work now .If you are only using it for drinking rather than boilg any water what about a SIG bottle with their sports cap,nice and lightweight.
A 1L canteen filled can be 'heavy' and awkward to carry (pulls belts down) where as 2x 500ml you can balance the weight better.