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.
My personal favorite is the hot chocolate topped with whipped cream and a drizzle of chocolate syrup. As you can see Starbucks price list for basic items such as coffee and tea are very fair. Most of these items start at the low end of a dollar and go up to about $3.50. The price is obviously dependent on the size and style you order.