Flask stacking?

Do the Atal’ai Potent Potables one-time flasks (https://www.wowhead.com/classic/quest=82016/atalai-potent-potables) stack with the new Alchemy epic re-usable flask? (https://www.wowhead.com/classic/item=222952/flask-of-restless-dreams)

Has anybody done the science?

From the looks of it you cannot stack them, only gives you one or the other atm.

Thanks. I only noticed that I had both buffs up. I should have checked the numbers.

I really hope that they stack… or that it at least takes some attributes from both. Another phase as an alchemist getting boned by less than great exclusive craftables is just insulting. If everyone gets flasks then why even bother with alchemy?
I’m seeing all my guild-mates craft cool shoulder items with unique buffs that are very helpful… and they also get the flask from the trolls. I really hope im wrong and that these stack but if they don’t blizzard may as well just say they hate alchemists. I feel like I haven’t gotten a single cool unique item as an alchemist for all of SoD so far.

Yes they do stack.