Okay lang yan, mama! A few of us actually have the same concern, and honestly yung small bubbles ay normal lang, lalo na kung medyo mabilis ang pumping or paglagay sa bag. Ang importante lang ay ang milk mismo ay okay pa rin, hindi sour o may weird smell, yung bubbles won't affect the quality ng milk para sa baby. But if you're worried pa rin, you can try tilting the bag slightly habang naglalabas ng air before sealing it closed, para ma-minimize yung bubbles next time.