Discussions tagged with 'flip-cap' Abdullah Polyethylene vs polypropylene plastic for caps of shampoo and emulsion products Abdullah replied 3 years ago 2 Members · 2 Replies Off Topic Graillotion Bottle closure and oxidation….. OldPerry replied 5 years, 5 months ago 4 Members · 9 Replies Resources Viewing 1 - 2 of 2 discussions