Breastmilk handling apparatus particularly useful for warming of breastmilk containers such as bottles and syringes

A liner configured to be used with an infant feeding thermal treatment system, the liner comprising:

• a flexible-receptacle defining an interior;
• a rim member having a first portion defining a receptacle opening for airflow from the thermal treatment system to pass into and then out of the interior,
• the rim member having a widened second portion extending from the first portion;
• a port formed in the widened second portion of the rim member such that the receptacle opening and the port are arranged eccentric to each other in the rim member, the port adapted to allow a container to be passed at least partially therethrough and into the receptacle interior;
• and
• at least one of a plurality of frangible sections and a plurality of slits arranged within the port such that each of the plurality of frangible sections and the plurality of slits have a first end that terminates in a center of the port and a second end extending radially away from the center of the port, each of the plurality of frangible sections and the plurality of slits configured to conform to the container when the container is pushed through the port.