Moisture ≤0.4% Good Processing Performance PET Resin for Flavoring Containers Problem Flavoring and condiment containers require precise, repeatable molding, yet moisture in the resin causes bubbles, silver streaks and weak weld lines. Those defects show up as reject rates of 3-8% and cause leaks in sauce and seasoning packaging. Because flavoring containers are often thick-walled, moisture defects are more visible and more damaging than in thin bottles, and each bubble or