just trash them.

If you want an enduring stat boost, eat food. Potions do not provide any significant advantage comparable to any ability with a five minute cooldown. 10 seconds is wholly insigificant, even if you use an 'earth potion' just before getting nailed with a Mountain Buster from Titan, it isn't going to have any significant impact.

Potions are a waste of resources, except high-grade MP pots for healers.