Halo Top is now tops. The lower-calorie ice cream reportedly outsells all other pints. That’s why Breyers, Skinny Cow, Talenti, and even Ben & Jerry’s now offer calorie-conscious competitors. The upside: a pint of some ice creams has the same calories as a half cup of Häagen-Dazs. The downside: many labels imply that you can eat their ice cream by the pint. (Sigh.) Here’s how to find a less-fattening, but still delish, frozen dessert.