Discussions tagged with 'flip-cap' abdullah Polyethylene vs polypropylene plastic for caps of shampoo and emulsion products abdullah replied 1 year, 1 month ago 2 Members · 2 Replies Off Topic Graillotion Bottle closure and oxidation….. oldperry replied 3 years, 6 months ago 4 Members · 9 Replies Resources Viewing 1 - 2 of 2 discussions