Potion Sommelier

You can take a small sip of any unidentified potion to learns its effects. 

You must succeed on a survival (15) check to learn of any effects that are not considered "harmful" (at the DM’s discretion). Any and all harmful effects are always revealed. If the player failed on the survival check, any harmful effects of the potion will be applied to the player. The potion is not consumed but you can only taste each potion one time.