Discussions tagged with 'flip-cap' Abdullah Polyethylene vs polypropylene plastic for caps of shampoo and emulsion products Abdullah replied 2 years, 2 months ago 2 Members · 2 Replies Off Topic Graillotion Bottle closure and oxidation….. OldPerry replied 4 years, 7 months ago 4 Members · 9 Replies Resources Viewing 1 - 2 of 2 discussions