One concern that may be only lightly relevant for such a functional thing as a lantern: as innovative as it is, the design looks rather dull to me, especially the top half looks a bit boring and maybe a bit cheap, it could use some bling. Is there still an option for a small styling change at this point?
I suggest either to add some of the knuring to the cap section too, to make it in style with the bottom section, and/or add some fins on top.
Pretty much for now until i can receive the prototype build sample to run a full testing on to make sure its in the specifications, there may be some minor adjustments or tweaks before the production one is ready to go.