As stated above. Those bottles are not heat tempered and not designed to be
heated that way. They probably will not explode as suggested above, but
they may break. No big problem. But they may also develop hair line
fractures that fail at an inappropriate time. If there are any air bubbles
in the glass, as there frequently will be in these bottles, the air in them
will try to expand under the heat you are talking about and generate
tremendous pressure. They will be small bubbles so I do not think the will
explode but that pressure can certainly cause fractures. Do it at your own
risk. You may set a bottle on the counter in front of a guest and have it
shatter when it taps the counter.

Ray

"StuPedaso" <StillAwake@2am> wrote in message
...
> I've heated wine and cola bottles to a very high temp before, and
> never had one crack or break. Was heating them to around 1400ºC, so
> hot they become like taffy, and stretch of their own weight.
>
> Anyway, the place I used to work, has a big 4'x4'x4' oven, and I
> thought baking 150 to 200 used bottles at once would be a real time
> saver.
>
>
> On 20 May 2006 07:43:04 -0700, "Droopy" > wrote:
>
>>Like wine bottles?
>>
>>They are not made of tempered glass. Heating them that high is
>>unadvisable
>
>>StuPedaso wrote:
>>> I have a bunch of bottles I need to clean. Was thinking maybe I could
>>> give them a good rinsing, then bake them at 350ºF for an hour or so
>>> (maybe after my wife cooks some pizza). Anyone ever use this method?
>>>
>>>
>>> Or maybe 451º would burn the lables off, then a quick air blast to get
>>> rid of the ashes.
>>> Stu
>