I dunno whether this belongs in the Obscure Suggestions Multipost, but here we go...
My pet, Depressive, is a master poisoner, so I've been hunting high and low for poisonous and toxic items for his TC and - to be brutally honest - I'm a bit disappointed. As far as I can tell we have little or no items for famous poisons such as:
Cyanide (as in, a sparkling glass of);
Arsenic (apart from one cookie);
Warning: Big pictures!
Hemlock (would fit nicely into Spells Galore);
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Ricin;
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Strychnine;
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Poison arrow frogs (I know we have a few, but they're really expensive so a plain minion would be nice);
So pretty
...and probably a few more I could think of.
And while we're on the subject, there's some venom/poison items that could do with a revamp, like these:
EDIT: suggested pretty poison bottles, so I found these too:
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it's true we're missing some of the famous ones. Maybe find some images and add them to your post?
We've got a lot of items with "poison" in their names including a few CWs.
Xotl are poisonous. Do Not Lick! The minions Rivenghe Qwirl and Velvet are poisonous.
We have Monk's Hood and Henbane and Galerina. We have various Deadly Nightshades. There are foxgloves as vesnali flowers, and foxglove is a source of digitalis. I think one of the other vesnali flowers looks like Nicotiniana, although I could not find it. I think there's a Donation Present that's a castor bean. Chilled Rodent Poison might be strychnine or not depending on Babette's feelings toward Dirty Matty that day. We've got rhubarb.
If Depressive is a master poisoner than some things humans could eat would nevertheless be poisonous to subetapets, so chocolate or lily.
The Nuclear Potion is pretty ominous, as is the Infinity Berry.
I am all for more poisons in neat looking bottles o3o Think of all the possibilities! Like these:

I'd love to see more poisons! There are so many bottle styles and plants that could be used, and Morostide would be a great time for it...
No idea what I would use them for but I definitely feel like I need some pretty poison bottles
Yes, please! Would love to see those cool looking bottles, too!
I have 99% of the poisonous items either in his TC or on my wishlist but a few of them are $$$. I didn't know about the castor bean present, though, thanks.
I'll look for some neat pictures and add them to the OP.
They're really pretty, Depressive would love those.