If would get 2 jars if I was you. Get a bigger jar that can hold an oz and has a rubber seal, then get another one for taking around with you. I use a strait amber jar that I found at a cooking store. It is about 3" wide and high and can hold a 1/4 inside a plastic bag.

I came across this while looking for a picture of a good jar.
Airtight Coffee Container

Here is a nice sealed jar that will keep your stash fresh.
Airtight Acrylic Canister