Early astronauts had simple, bland food that was dried or in easy-to-use tubes to prevent floating debris or inhalation hazards in the microgravity environment. Common early foods included biscuits, nuts, and vitamins. Foods then and now must pass tests for light weight, healthiness, and ease of consumption and disposal. Space food sticks were an early snack option starting in the 1970s and available in flavors like chocolate and peanut butter. Food options have since evolved, allowing items like bagels in 2008, as inventors strive to make more earth-like meals possible during space travel.