Duncan Brothers (Bangladesh) Ltd. is the managing agency for one Bangladeshi and six UK-based tea companies engaged in producing tea in sixteen gardens located in the traditional tea producing Moulvibazar and Habiganj districts of the greater Sylhet region. Rubber is also a major product of Duncans and is produced and processed in thirteen of the sixteen tea gardens. Duncans also produces and markets bottled drinking mineral water from its own facilities in Dhaka and Chittagong.