For the price of one fancy latte, customers can enjoy an entire month of coffee. Perhaps the only downside making a to-go cup of coffee part of your morning commute is the cost. If you opt to make coffee at home, there’s obviously a significant savings versus shelling out — at the cheapest — a buck or two each morning. But as a New Yorker frequently on foot and in between subway rides, I certainly value the ability to pop into a deli or cafe, pick up a conveniently lidded and paper-sleeved cup of joe and be on my way. While some major players in the convenience coffee business, such as McDonald’s or Dunkin’, are trying to compete with Starbucks by offering a menu of upscaled espresso beverages, Burger King announced Friday the chain is making a major play to compete on price by offering a coffee subscription for just $5 a month.