Hello all

In first, sorry to my english, i am french :D.

I would know if we can make some little bubble in a sparkling water, like coca cola or Perrier.

All that with Mental ray. Not particle.

Thanks to the answers.

Why not use particles, and mental ray? You can make a water material with an A&D material. You can start with the Glass Physical preset and alter to make it more like water, with IOR of 1.333 and change the refraction Colour At Max Distance. See the Help file, the section Arch & Design Material (mental ray): Tips and Tricks shows how to create a physically correct render of a glass of drink.
For the bubbles Pflow is simplest, definately if you are animating the bubbles. A Position Object operator set to Volume will distribute bubbles in the liquid, setting it to Surface with an offset could make them stick to the sides of the glass if you want that, or have both.
If you don’t want to use particles, you could try Scatter to distribute little spheres in the liquid for bubbles.
You may also want to experiment with Caustics for this render.