Pocketable TC Box Mod Concept for Dry Herb

So the goal is to create a side loaded attachment on a mod for dry herbs like the Tubo Evic. It emphasizes on a compact form factor to be used in a country where cannabis is illegal. I have made quick 3d models for an evic VTC mini. Would appreciate the help by getting early feedback on the design and heating elements that could be used for this (maybe something like the 'the project'?). Finally, I would want it to be more battery efficient than the Tubo, even if it means a smaller bowl or...

Pocketable TC Box Mod Concept for Dry Herb