I just saw this thread over on EN World, and it got me thinking…
The material enclosed in the box below is released via the Open Game License.
Create Spell Grenade [Item Creation]
You can create potions from ray spells (spells in which the effect is a ray) of third level or lower using the normal rules for brewing potions. The potions created are treated as thrown weapons that require a ranged touch attack to hit and no weapon proficiency to use.