Potions can be created with metamagic feats, so long as they don't exceed the potion spell level limit (3).
Magic Items and Metamagic Spells: With the right item creation feat, you can store a metamagic version of a spell in a scroll, potion, or wand. Level limits for potions and wands apply to the spell's higher spell level (after the application of the metamagic feat). A character doesn't need the metamagic feat to activate an item storing a metamagic version of a spell.
Can an alchemist apply metamagic feats that he knows to an extract as he creates it?