(qepHom 2017):  The noun ba'Suq is used also for a chewing gum bubble, a soap bubble and so on. You can even have bubbles in the bath tub, and the foam in the bathtub is made of millions of bubbles, but the foam itself is not called bubble. Of course, you can add suffixes to it for very small bubbles, like the ones you have in sparkling water and champagne, for instance.

SEE:

'o'nI' Sub      solid foam (like  Styrofoam) (n) (qepHom 2020)

SEE ALSO:

qa'vIn          coffee (n)

ra'taj          *raktajino* (coffee with liquor) (n)

'awje'          root beer (n)

qulcher         cream (n)

vut             prepare food/drink (v)

jeD             be thick, dense, viscous (v)