SS Cup to nest with normal Nalgene bottle?

[Stormstaff]

I thought I'd look at the GSI SS cup but I read 3 different reviews that stated this cup doesn't fit a normal 1L Nalgene. Is there a cup out there that does OR am I going to have to switch to a tapered Guyot SS bottle?

Thanks in advance!!

 

[storl]

Olicamp Space Saver cup does it and does it well.