pump•mate™ advocate program Pump mate is a system whereby breast milk is pumped right into sterile bags that can be used in baby bottles. Seems like a good idea, but it’s not, for a variety of reasons. For one thing, sucking on a bottle and suckling at a breast are two very different mouth movements. A baby who gets both is likely to get tired of the breast. So pumping breast milk to be fed by a bottle is not likely to achieve the desired result of improving breast milk intake. (supplements to breast milk should be given in a cup.) For another thing, there is the mildly unsavory advocate program.