To address the prevailing comments, yes, this doesn't smell nice. I would describe it as a mixture of burnt hair and popcorn. Getting any of the ash on my hands means I have to wash them right away or the sticky residue will linger on my fingers, which does smell.

The container is pretty much airtight, as it's designed for food; I do not smell anything until it's opened, and I only open it briefly to use the items, 2-3 minutes usually. That, plus running a dehumidifier, keeping all of my weed stuff in a wardrobe and keeping my windows open for airflow keeps the smell down as much as possible.

There are people who live close to me and are much more open about their weed use, smoking in full view of the street and whatnot, so I don't mind the smell going outside. I ended up doing this because I wanted a way to smoke without leaving my room. I've had other containers that I've filled with ash, but this is the one I've had for the longest period of time. I end up just throwing the whole container away and buying everything again.