Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Does it work on glass bottles?
Document: To beat the high cost of the water man (in the old days we had home delivery of glass 1 quart milk bottles) we have resorted to paying $1.00 for a 5 gallon fillup from the Glacier water dispenser at the local supermarket. This pump is much better than the one I purchased locally.
must not work with all 5 gallon bottles..  does not properly seal to the vmi housewares bottles i own. waited three weeks for it to be mailed.. not thrilled at all.
I use this on my 5 gallon water bottle from Deer Park delivery service. I work in a location where I don't have access to shops for grabbing a quick drink and I am forever forgetting to pack one. I solved this by lugging in one of my 5 gallon bottles and attaching this. Works fantastic--just like any other pump.
I read all the reviews prior to purchasing this and the ones that describe how great it works are right on. This will fill a glass or small bottle in one pump. Works GREAT!
Works fine on my 5 & 6 gallon glass carboys. Have to pump a little more once the water level drops from &#34;full&#34; which makes sense as the air in the carboy has to be compressed enough to push the water out.
first pump and it flows immediately, its just a lil bulkier than i thought it would be but, i got it mostly so i can take it camping and have fresh water for cooking and drinking, I pushed the pump down and it just kept flowing without having to pump it over and over again so getting a glass of water is quite simple, product arrived on time
very good they work well thank you
Doesn't work. Probably a defective model, but didn't use until after exchange period was over so now I'm stuck with a $13.00 piece of plastic...
I bought one for home and a second one for the cottage. They are sturdy, well made, simple to set up and they work great!
I work in a large office not very close to the water cooler, and when i need some water for my coffee maker, this product was the answer. Simple to use and effective.
Answer: Based on my memory of the old glass bottles, this pump should work fine.  The seal will work on any bottle as long as it fits over the neck/opening and since it operates on positive pressure the rigidity of the glass wouldn't be a factor.