Endless Mug ownership entitles you to free refills, solely of hot coffee and tea, and only through 12/31/18.
No refills of espresso drinks, lattes, iced.
Refills require presentation of an Endless Mug by its owner at a register.
Endless Mug ownership is non-transferable and the mug can only be used by the owner
Refills may not exceed one per half hour. Refill at participating Au Bon Pain locations only.
From their website
IF YOU PURCHASE MEDIUM HOT COFFEE 3X A WEEK, SAVE $96.20/YEAR
MUG PAYS FOR ITSELF BY AUGUST 19, 2018
IF YOU PURCHASE MEDIUM HOT COFFEE 5X A WEEK: SAVE $293/YEAR
MUG PAYS FOR ITSELF BY MAY 13, 2018
IF YOU PURCHASE MEDIUM HOT COFFEE 10X A WEEK: SAVE $785/YEAR
MUG PAYS FOR ITSELF BY MARCH 11, 2018
*Savings based on a 48-week average price of $2.05 per medium hot cup of drip coffee and includes price of mug.