Abstract: A baby feeding bottle has a body with a threaded neck onto which a tightening nut is screwed to keep a nipple in place. A removable receptacle carrying a fluidized mass to be mixed with liquid in the bottle body has a flange and open end, as well as a size and shape enabling it to be received in the bottle neck. While the receptacle is in the bottle, its flange rests on the bottle neck. The bottle carries a funnel-shaped cap that fits over the bottle neck to protect the bottle nipple or can be inverted to function as a funnel for facilitating pouring the fluidized mass into the baby bottle.