Er, well, I dropped a glass in the sink not too long ago, and a lot of it went into the garbage disposal. I tried to limit how much, but a goodly amount went in, and I ran some water into it and then turned it on to work it out. It made an unhappy sound, but it did grind it all up and through. I don’t know what it did for the “cleanliness” of the garbage disposal, or whether it did any damage, but it’s been working fine for months since.
The sound it made, did not sound good, though. I would recommend against putting a bottle in one, also because if you really fed a long bottle in, part of the bottle would be sticking out when the bottom got ground up, which I expect would tend to shatter and scatter the rest of it in dangerous shards all around the area of the sink and nearby kitchen.
There are other (I expect better) ways to clean out a garbage disposal. Hot water, baking soda and vinegar, etc.