Potions are objects located at the Short Fuse. If broken near a pig(s), a chemical reaction will happen.
There are 3 types of potions.
Orange Potion : Makes the pig inflate and pop away like Bubbles.
Blue Potion : Makes pigs divide by 3 into smaller sizes similar to The Blues.
Pink Potion : Turns the pig into a bubble that can grab blocks and then pops like Stella's bubbles.
At the Golden Egg Level 31 found at Short Fuse, 5 blue potions could be found hanging at the right side of the level. When they have contact with the 3 pigs above them, they can multiply up to 243 pigs, giving up to 1,215,000 points. That made it the highest possible score in Angry Birds.
If the nearby orange potion has contact with all those pigs, the game would lag and have hundreds of large pigs would be surronding the whole level.
The level has been edited, and two potions were removed, now giving 405,000 points from 81 pigs.