Additives Bottle Cap

The present invention relates to an additive-infusing bottle cap. More specifically, the present invention relates to an additive-infusing bottle cap configured such that additives (functional substance) containing minerals, vitamins, and fruit flavors are provided inside a bottle cap so that when engaging the bottle cap with a container, the functional substance falls into the container and mixed with water. The additive-infusing bottle cap is configured with a thread portion provided on an inner surface of a body part to be screwed with a thread of a container and includes: a storage portion provided inside the body part and being movable while storing a functional substance therein; the functional substance filled in the storage portion; and a pressing portion provided in a space defined between the storage portion and the thread portion of the body part to press and tear the storage portion when engaging the bottle cap with the container.