Just ordered one of these for my keyring so i’m never caught short. 
http://www.amazon.co.uk/Stainless-Steel-1oz-Flask-Ring/dp/B000SM3NTU/ref=sr\_1\_1?ie=UTF8&qid=1318625118&sr=8-1
Looks like a Mr Snuff one. Actually they are perfect snuff containers because they are air tight. Good buy.
Ansel, I said this on snuson so I hope you don’t mind me repeating it here. Nice little flask however, the problem with square flasks is you get snuff caught on the shoulders and you have to use water to clean them every time you want to use them with a different snuff. Try drying that in a hurry. I think they are best left on a radiator for a few hours and check it before refilling. Try and find a round flask and you’ll find them much more user friendly and comfortable in your pocket.