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I've been working my way through pottery recently, and I found a few more skins that do and don't work.
Add to the DNC list: Low Quality Coyote Pelt, Grizzly Bear Skin, Mountain Lion Pelt.
Add to the DOES work list: Puma Skin, Thick Grizzly Bear Skin.
These were tested with Sealed Poison Vials, but I imagine they work for other vials also. I'll post back here as I find and test more skins.
You may wish to update the list at the bottom of the pottery page:
http://www.eqtraders.com/secrets/recipes_pottery.htm
On the same page, just above the note, you have a list of mana vials. It's missing Vial of Viscous Mana. The sentence that should be added is:
Given how hated by tailors this item is, I'm not too surprised it's missing -- some disgruntled tailor must have snipped it off with his shears! 
Add to the DNC list: Low Quality Coyote Pelt, Grizzly Bear Skin, Mountain Lion Pelt.
Add to the DOES work list: Puma Skin, Thick Grizzly Bear Skin.
These were tested with Sealed Poison Vials, but I imagine they work for other vials also. I'll post back here as I find and test more skins.
You may wish to update the list at the bottom of the pottery page:
http://www.eqtraders.com/secrets/recipes_pottery.htm
On the same page, just above the note, you have a list of mana vials. It's missing Vial of Viscous Mana. The sentence that should be added is:
The vial of viscous mana is made by an enchanter using the level 12 Thicken Mana spell. It requires a poison vial and a pearl as material components