I just bought this GSI Outdoors Bottle Cup, which appears to be nicely made, but it has two minor problems.
First, it’s a little big for my Guyot/Nalgene stainless bottle, mostly because the bottle tapers toward the bottom so that it will tend to fit carriers for the thicker plastic bottles but contain exactly the same known amount of water No biggie, I’m sure I could pack something useful to take up that space along the wall of the cup!
The problem is that the cup also does not fit into my Nalgene-branded bottle carrier. (Do you get the notion I do a lot of shopping at Amazon for the free shipping?)
So, what I’m looking for is one of two things:
- A slightly smaller cup that fits the Guyot bottle and Nalgene carrier.
- A similar but slightly larger bottle carrier that fits the GSI outdoor cup without looking tactical. Similar useful pocket arrangement wanted, if possible.
In the latter case, I think I’d also welcome suggestions for silencing the rattle in a constructive manner. 
Suggestions wanted! 