On most lists of products containing estrogen, animal products like milk and beef are at the very bottom. Milk, for example, is said to provide 1.2 micrograms of estrogen per 100 grams.
Depends on where you go to get your fix. Starbucks Cold Brew (in stores nationwide since May 2015) and Dunkin' Donuts Cold Brew (in stores nationwide since August 2016) retail for different prices. Cost: Roughly $0.20 per ounce. $3.25 for a grande (16 fluid ounces) according to Starbucks.
Similar to a soda fountain, nitrogenated coffee is extra smooth and looks a little like a Guinness. Stumptown Coffee, a famed roaster out of Portland, released nitro cold brew in a can in April and has supplied many coffee shops (both its own and others) in New York City with kegs of the stuff. Bars and restaurants are also trying the trend, with some offices even offering it as part of their coffee service.