bite-sized chocos

I need a small dose of chocolate each day - this 1x1 square chocolate can be found at nearly any Japanese convenience store for about 20 cents, each. You may think like this is overpriced but think again. Would you rather get more for less and then pay 50 extra dollars for that 'miracle diet' supplement?

I usually buy a few at a time. Not much better than a full-sized candy bar I suppose, but hopefully adds up to less? Chocologic is not very logical, I have come to realize. Calling out to any other chocoholics out there? Have any stories to share?