These little fridge-pack boxes can be awesome, when opened properly.
Here's the problemopening by tearing simply doesn't work.
Instead, make a firm open hand.
Get angry, people.
Now, visualize the can trapped behind the perforated flap. And with brute force, grab the can.
Ignore the fact that some thin cardboard ever stood between you and your beverage.
Alas! You're almost there, your beverage sits firmly in your grip.
Now, in one violent motion, pull back at a 45° angle and free your can.
It's a thing of beauty, isn't it?
Put it in your fridge and enjoy!