Container with a spout

A container assembly, comprising:

• a container comprising a neck defining an opening into the container;
• and
• a spout disposed in the neck of the container, the spout comprising:
• an outer sidewall defining an interior of the spout,
• a flange projecting radially outward from the outer sidewall, and
• a plurality of spout teeth extending from a bottom surface of the flange and disposed around a perimeter of the outer sidewall,
• wherein the neck of the container comprises a plurality of neck teeth disposed along an interior surface of the neck and coupled with the spout teeth,
• wherein the plurality of spout teeth and the plurality of neck teeth have a height in a range between about 0.50 mm and about 1.00 mm, and
• wherein the plurality of spout teeth have a tooth face inclined with respect to a horizontal plane extending parallel to the flange at an angle in a range between about 30° and about 45°,
• wherein the spout comprises an annular seal ring integrally attached to a distal-most upward facing surface of the flange, wherein the flange of the spout comprises a first material having a first durometer and the seal ring comprises a second material having a second durometer that is different than the first durometer, wherein the flange projects radially outward from an upper end of the outer sidewall, and the distal-most upward facing surface of the flange is disposed below a rim of the neck, and wherein the annular seal ring extends upward beyond a distal-most upward facing surface of the neck.