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Plastic bottles start out usually about 2 or so inches around and approximately 8 inches. They are then heated in a machine wich softens the plastic then air is forced into the bottle leaving the endentation which was caued .

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14y ago
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14y ago

To make it crinkle and crush more to keep your pet dog entertained

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12y ago

easy to make and strong unlike glass witch can be broken or explodes in heat

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Q: Why do plastic bottles have an indent in the bottom?
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Related questions

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Information on free plastic bottles are most commonly found on the side of the bottle. Some producers have also put their information on the bottom of the bottles, but that is more seldom.

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