Was It Designed?

The Beetle's Pressure-Spray System

Through less then an inch in length, the bombardier beetle is noted for its unique defense mechanism.
When threatened, the insect sprays boiling, foul-smelling liquid and steam from its posterior, warding off spiders, birds, and even frogs.

Consider: This beetle is equipped with " a pair of glands which open at the tip of [its] abdomen."
Each of theses has a reservoir that stores an acidic compound and hydrogen peroxide as well as a reaction chamber filled with enzymes dissolved in water.
To protect itself, the insect can squeeze the solution from the reservoirs into the reaction chambers to trigger a chemical reaction.

The result?