Would you drink from any of the pictured delightfully glowing bottles of unlabelled substances? Identifying potions by taste test really puts the adventure in adventurer. Doubly so if you get a description worthy of the rainbow-tastic brew of potions you available in today's motivator. Best to have the dwarf go first. They've got all sorts of crazy drinking related immunities. Or the elf, since they're expendable. Or the halfling, as revenge for stealing your shinies.