*Reset ... oops lol
Alright, I searched everywhere and all I could find were posts of people inquiring if this was possible. So, I don't know the extent of how far this can go, but I have learned that a Canopic Jar's loot can be reset, thus giving you multiple chances on the Vial of the Sands recipe. It is possible this works with other loot containers but I cannot confirm this.
I want to say that I was inspired to do this from the very old Landro's Loot trick that blizz fixed. However I was self-convinced that blizz never really fixed the issue as a whole, and only addressed that one item.
Basically the way this loot trick works is that whenever there is a major patch reset, if you have containers in your bank or your bags, it actually resets the loot table of those containers, thus if rares drop in those containers, you basically don't loot them completely, or you leave an item inside them, wait for a major content patch (like 5.1, 5.2 etc..), and then re-check them.
So, I've been collecting Canopic Jars for quite some time on my Alchemist, so I can get the Vial of the Sands recipe. So, rather than AUTO-LOOT the mummified remains, I shift-clicked them, looked and saw no recipe, then threw the canopic jar into my bank. I started doing this in patch 5.0 -- 5.1 rolled around and I checked my 10 collected jars and still nothing. Still, I was convinced it was just bad RNG luck. 5.2 rolled around and I completely forgot to re-check this alch alt of mine.
So, today I logged over, went into my bank and sure enough, my 2nd jar I re-checked I got the recipe, thus confirming that the loot tables of the container were reset.
I don't really have a way to prove this, but I thought I should get the word out to you guys since 5.3 is around the corner, and with the recent Tol'Vir archaeology exploit posted a few days ago to get an unlimited number of Tol'Vir dig sites (Archaeology: Infinite Tol'vir Digsites)HERE: I wanted to give you the heads up to hold on to your canopic jars and if you have bad luck now, you'll have a whole new shot next patch.
Remember, you MUST be an alchemist to even have a chance at Vial of the Sands recipe dropping.
Potential Other Loot bags?
Bonus bag tanks/healers can sometimes get in dungeons
LFR loot bags now supposed to have chance of bonus items
Please post others you can think of...
ENJOY