Starbucks is giving the gift of free coffee this holiday season.<br />The coffee retailer is offering a free tall coffee (hot or iced) to frontline workers during the month of December.<br />According to Business Insider, this is the second time the chain has offered up free drinks this year.<br />Frontline workers eligible for the offer include "hospital staff including janitors and housekeepers.<br />Pharmacists, firefighters, and dental professionals will also be able to cash in on the deal.<br />Along with the free coffees, Starbucks is giving $100,000 to the National Alliance on Mental Illness.