text: It must be the material used to make the part holding the straw in place that is defective because the green version of the prod
  
  Tried two of these straw cups in this design, and I sent both back. It must be the material used to make the part holding the straw in place that is defective because the green version of the product works fine. I usually enjoy Contigo products; this is the first time I've been disappointed.