Actually, I only raised quail for about a year and then sold my housing unit. I never had a problem that I know of, but there is no reason why they need to have so much head room.
Here is a link to more details about my quail housing. https://www.backyardchickens.com/a/coturnix-quail-1 Mine is a slight modification of that shown on this website http://suburbansustainability.com/
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Might these be the type you're asking about? Just wrap the spring around the bottle. I think it helps to have a little ledge inside for the spout to rest on, although I doubt it is required.
I call this photo Before the First Drop Falls. There are many details included on My BYC Page, under "coturnix-quail." I have 10 jumbos that are 2 weeks old, and 24 that are 4 weeks old. I may move the older ones to the new pens this weekend, depending on the weather. This is my first try at...