Smoking cannabis flower is still one of the most popular ways to use cannabis. At most dispensaries, cannabis flowers are stored in two ways:
The barrier bags and glass jars mentioned above are primary packagings that contain the cannabis flowers directly.
This image from How To Buy Packaging illustrates the different levels of packaging.
Simply put, folding cartons can serve as secondary packaging for cannabis flowers, which are stored direcly in the barrier bags or glass jars (as primary packaging).
All in all, a small paper box serving as secondary packaging could play a major role in your successful branding efforts.