Cranberry fruit is the apple of the eye of August and September. Generally, the taste of the cranberry fruit, which loves the Black Sea coast, is sour and sour. It is also a very assertive fruit with the taste of cranberry fruit. Cranberry fruit has a lot of benefits. The flower, leaf and body of the cranberry fruit, which is a member of the dogwood family, is a healing store.

Various products such as cranberry sour, marmalade, jam, cranberry juice, sherbet are produced from its fruit, also known as kiren in the region, and these products are frequently consumed in Zonguldak. The famous Devrek Walking Stick, a geographically marked product of Zonguldak, is produced from cranberry branches.