Sonic Debuts a 1,720-Calorie 

Peanut Butter and Bacon Shake!!!

If you're looking to get in shape for summer, you'll probably want to steer clear of this one. But if you want to sample the cutting edge of unhealthy fast food, you can get it for half price every day after 8 p.m., along with the 24 other shakes on the Sonic menu.See more here