Over time, I have come to appreciate glass bottles for storage of my mixes. It's kinda like making coffee in a French press pot. Nothing comes between me and the fresh ground beans except H2O and stainless steel mesh. Yummy! Same with glass bottles for my juice. I can wash and reuse them, knowing there is absolutely no residual flavors left over from the last juice, hiding in the plastic bottle or spout.
I used to have to soak the plastic bottles in vinegar for up to 48 hrs to rid them of residual flavors. Drag! Glass does not hold any scent.