Razo & James are absolutely correct. Wide mouth mason jars are perfect for your opened pipe tobacco storage. If I remember correctly, keeping it in a dark closet or box is best as the light can affect it over time. The best thing about the mason jars imo is that for people like us who don't smoke frequently, we can have several different tobaccos in rotation with no worries about them drying out. One other bit of advice, many aromatics are really too wet right out of a fresh tin and could use a little bit of drying, but not too much or you will lose some of the aromatic flavors.
Eric G (Merkur 38C, Parker Silvertip, T&H Sandalwood Cream & AS, Personna Red)