Some state laws require the employer to give the employees (hourly) coffee breaks...but it's not required by federal law.
http://www.dol.gov/dol/topic/workhours/breaks.htm
"Federal law does not require lunch or coffee breaks. However, when employers do offer short breaks (usually lasting about 5 to 20 minutes), federal law considers the breaks as compensable work hours that would be included in the sum of hours worked during the work week and considered in determining if overtime was worked.
Bona fide meal periods (typically lasting at least 30 minutes), serve a different purpose than coffee or snack breaks and, thus, are not work time and are not compensable. "
Here in California, an employee is allowed a 10 minute break at the mid point of every four hour portion of the work day.
http://www.dir.ca.gov/dlse/faq_restperiods.htm
"Employers of California employees covered by the rest period provisions of the Industrial Welfare Commission Wage Orders must authorize and permit a net 10-minute paid rest period for every four hours worked or major fraction thereof. Insofar as is practicable, the rest period should be in the middle of the work period. If an employer does not authorize or permit a rest period, the employer shall pay the employee one hour of pay at the employee's regular rate of pay for each workday that the rest period is not provided."
Meal breaks must be given to any employee who works 5 or more hours per day...with some exceptions.
http://www.dir.ca.gov/dlse/FAQ_MealPeriods.htm
"In California, an employer may not employ an employee for a work period of more than five hours per day without providing the employee with a meal period of not less than thirty minutes, except that if the total work period per day of the employee is no more than six hours, the meal period may be waived by mutual consent of both the employer and employee. A second meal period of not less than thirty minutes is required if an employee works more than ten hours per day, except that if the total hours worked is no more than 12 hours, the second meal period may be waived by mutual consent of the employer and employee only if the first meal period was not waived."