I know many decry the security of paint can tins but I have had good success with them (so far). This one Comiy’s Cask No. 4 is a prime example. Had it out on my back porch for a few years. Clearly had gotten rained and snowed upon and was stowed in a random box of stuff. Came upon it recently and thought for sure the tobacco would be dust or at least rigid planks of crumbly flake. Popped the top and the aroma was fantastic, the flakes perfectly pliable and perfectly moist. Compare that to its brethren round tin - the twist top, held as being one of the most reliable of its kind. I was rooting through the cellar the other day and came across a tin of 2018 McConnell Folded Flake that had lost its seal. Flakes bone dry, rigid and crumbly. The other paint tin cans I have seem to do rather well, even after opening more than a decade. YMMV.