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Soda bubble formation rate on plastic straw and glass cup

  1. Oct 16, 2016 #1
    I observed that if you pour soda into a glass cup and leave the straw inside, bubbles seem to form on the plastic cup at a much much quicker rate. Why is this? Why do bubbles form on the straw at all?

    Not sure if this should be in general physics or chemistry
  2. jcsd
  3. Oct 16, 2016 #2
    Something i found while doing research, they state that PET has a specific property to absorb bubbles, but why?

    Plastic straws have a specific property to adsorb bubbles. This property is more significant in PET (poly ethylene terephthalate) and hence these bottles serve as good containers to store aerated drinks to retain flavor and fizz. Some of us can try and see whether straws made of glass can adsorb bubbles just like plastic straws.
  4. Oct 16, 2016 #3


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