Mother's 3rd Arm is a flexible, portable cup or baby bottle holder designed for use by children and adults with upper extremity disabilities. This device consists of a large cylinder affixed to a long flexible neck with a large clamp at the base. The adjustable clamp permits the device to be secured to the edges of tables or desks, the back of automobile seats, bed rails, or to the tubular frame of a stroller, wheelchair, or high chair. The cup or baby bottle is placed in the cylinder and the neck is adjusted in any direction for optimal positioning. When used with a baby bottle, the device permits independent drinking by children with upper extremity disabilities or it can support the bottle for parents with upper extremity disabilities, enabling them to give the child a bottle. When a cup or other container is placed in the cylinder, the unit can be used to hold craft supplies, crayons, pens and pencils, eyeglasses, a television remote control, or other small items. COLORS: black, passion pink, and canary.