Mesh and Fluid Problem

[sc00b]

This is good ol' tunneling. If you move an object by changing its transform, you're essentially teleporting it from frame to frame, which causes particles that were inside the container to be outside the next frame.

Try adding a ObiKinematicVelocities component to the glass (and a kinematic rigidbody). This will calculate actual linear/angular velocities from the transform position deltas, allowing continuous collision detection to kick in and reduce tunneling. See the FaucetAndBucket sample scene for an example.

You take it and try it yourself) you have everything falling through the bowl on that scene too) make transparency to the material. And you will see that there is a problem.