Fast-Cap makes some innovative and good products. Because of that I tried their Glu-bot when my last glue bottle died. (http://www.fastcap.com/products.aspx?id=286) Having used it for a month, I can tell you it has serious design flaws.
1) There's no way for air to get into the bottle. When you squeeze glue out of a glue bottle, eventually air must get inside to replace the glue. On the Glu-bot, I had to loosen the screw-on cap every once and while to let air into the bottle. That's dumb design.
2) The screw-on cap must seal perfectly so that you can squeeze glue out the tip. With all the screwing and unscrewing, the gasket on the cap quickly died, and the bottle became unusable.
3) The cover for the tip is loose. There's a little nib to store it on the cap, but sometimes I forgot, and sometimes it fell off or got knocked off. That leads to much searching on the bench or floor. Designers of other glue bottles have figured out how to keep the cover captured so it doesn't get lost.
This is a product I do not recommend.