When life gives you a lemon, make a lemonade – or so the saying goes. Well, what happens when you are not the type who is able to take in anything and everything sour? I guess this is where you should avoid the $19.99 Portal 2 Lemon Grenade Mug, as this mug itself looks combustible right from the get go, although it is more than capable of holding up to 12 ounces of your favorite drink – lemonade included. It is said to feature the Aperture Science Combustible Lemons logo, and don’t worry, the folks at the lab have ensured and given their personal guarantee that lemons inside of it will not explode. The perfect addition to any geek’s kitchen.