Fizzy Pop Bottles?

[The Vortex]

Does anyone out there know why there are the lumpy bumpy bit on the bottom of cola bottles?

[NORMANTHEDOG]

yes,its so they stand up and dont fall over

[kat_2502]

lol

[heathfield]

The lumpy bits strengthen the base so the bottle doesn't burst if you drop it.

[samuel23]

or is it a subtle psychological ploy to make the bottle appear as if it holds more?

[what..the?]

Most fizzy drink bottles are made of Polyethylene Terephthalate (PET)

In all bottles made of this there is a small dimple on the bottom of the bottle and, in the case of fizzy drink bottles, a flower-shaped base. This flower shape helps the PET bottle to cope with the pressure put on it by fizzy drinks. The dimple is caused when the bottle is blow-moulded upside down - the dimple is where the plastic was forced into a mould and then cut off.

[WoWo]

Do you remeber when they had a black plastic cap on the bottom? they use to be round on the ends and therefore wouldn't standup on the shelves and so had a black plastic cap to keep them upright.

[what..the?]

WoWo - My friend says yes he remembers them but I'm younger 25 and so I dont really know them, how long ago do you think they were around?

[The Vortex]

Thank you ALL! I can now get to sleep at night!

[filthiestfis]

I remember the black bottom caps used on bottles and Im 25. This must have been 15 years ago and back.

[what..the?]

Ahh right I must not remember the black caps because my mum was one of those - "NO we cannot buy crisps and 'pop' like everyone you know from school" which meant I was stuck in the orange squash section on the shop!

Of course as soon as I left home I eat and drank any thing bad for me to get my own back - ha haaaaa!