| 摘要 |
A bottle constructed to resist distortion and denting upon handling through distribution and/or expansion and contraction of its contents. An upper portion has a rounded upper shoulder and a series of grooves. A bottom portion is concave and has a plurality of alternating generally vertically extending long and short swirl grooves, the spaces between the long swirl grooves above the short swirl grooves being smooth to easily flex in and out to contract and expand. A main circumferential groove separates the upper and bottom portions and has a depth such that it can flex vertically when a vertical force is applied tending to push the upper portion against the bottom portion.
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