I have both the GSI and the Olicamp. In terms of fit and finish, identical, but you'd really have to work at it to have a substandard product of this nature. The Olicamp gets my nod though, because it has graduations.

For both of them, if you have a side-cut can opener, the end of a standard coffee can fits perfectly for a lid. You can see what I mean here: http://forums.equipped.org/ubbthreads.ph...=true#Post80717

The Vargo Ti-Light is larger than these are, but pricy. I wish they made a stainless version of it. It might be the perfect one, but I want a chance to handle it before I buy, the lid looks like a finger burner.