When a hole is made in the side of a container holding water, water flows out and follows a parabolic trajectory. If a hole is made in the side of the container and the container is dropped in free fall ( just before the water starts coming out), the water flow (Neglect effect of surface tension)

When the container is at rest with respect to the Earth, there is pressure on the walls due to the weight of the water. The pressure results from the contact force between the water and the container. In free fall, both the water and the container have acceleration of g, and the contact force is zero, so removing part of a wall by making a hole produces no outward flow. (Note that some of the water is in contact with the air, which is not accelerating, so there is still atmospheric pressure on the water.)