If you are getting alot of air it means most likely that you are trying to pull on the stopper too quickly.
Pull on the stopper VERY slowly. Since this is not an airtight bottle, you cant inject air into the bottle to create that reverse vacuum-effect for easy drawing.
Just be patient, and too help it, before you break the amp, try running it under warm water so that its easier to draw.
Tilt the amp on its angle, and draw from the bottom corner. REALLY slow, almost not moving if you have to.