Please don't worry, this is nothing to be concerned about :) During the rapid cooling process a little air bubble can cause a small hole to appear in the surface of your deodorant, usually in the center, but your stick will still work exactly the same. 

We check the weight of every single deodorant to make sure you get all 60 grams :)

On a side note - sometimes (if you're VERY lucky) it might be shaped like a smiley face!