In gripping the cup the weight of the object is used because the circumference is supported by the grip formed by the thumb and middle finger, and a hook made up of the index finger. This grip requires excellent thumb and middle finger stability, as well as the integrity of the deep flexor on the index finger and abductor on the thumb, which is essential for this task.
To grip the cup it is important to have good skill in using flexing/ extending muscles of both the hand and the rest of the upper limb in a harmonious manner, for the reaching and subsequent gripping phases.

You can also work on the patient’s capacity to open their hand to grip / release the cup at various heights.

Common disposable plastic cups can be inserted.