Self-standing polyester containers for carbonated beverages

摘要

The invention provides a self-standing blow molded two liter carbonated beverage bottle 1 weighing under 50 grams and having a unique petaloid base 7. The base comprises a petaloid design which has a plurality of at least three (preferably five) feet 9. Between each adjacent pair of feet is a radially extending valley 12 the width of which decreases with increasing radial distance from the bottles longitudinal axis toward a point of convergence 14 radially outside the bottle's diameter. The valley floor generally follows the hemispherical base shape and opens to an extended portion 13 of that base shape lying radially outwardly of the feet. The valley and extended portion initial pressurization of the bottle, deformation of the extended portions outwardly with a resulting raising of the center of the base away from the support surface.