Hello,
are there archetptypes, feats or others that permit to store a potion, elixir ... in the body for a use later ?
If yes, which ?
Thanks for your future answer.
I found this :
http://www.d20pfsrd.com/magic/all-spells/t/touch-injection/
You mean simple storage? 'cause Potion vials aren't that big, you could just, you know... shove one somewhere.
This is not for potions, but there is Delayed Consumption for extracts, the Alchemist-only version of Contingency. More limited spell list, but you can activate it with an immediate action rather than having to specify a trigger. And you can give an infusion of it to other characters, too, which is the only way to use Personal spells on non-spellcasters.
And yes, Touch Injection is pretty great and there's nothing stopping you from using it on yourself. Doesn't save you any actions if used by an Alchemist with extracts (since drawing and drinking one is a standard action for an Alchemist), but other characters can use it, too. And it saves you the move action of retrieving a potion or elixir.
Then there's the Poisoner's Gloves, the equipment version of Touch Injection. You have two gloves, so two injections. Obviously both this and Touch Injection are intended to be used on other people, but I don't see why you shouldn't be able to use it on yourself.