An expert in bottling machinery suggested that the closer the beer in the bottle is to the bottle mouth, the less risk of an explosion is possible. Because the amount of inflated carbon dioxide what caused an explosion is small. So, which liquid level in the beer bottle is proper? In general, beer filling machine makes the liquid level 35mm away from bottle mouth in 1L bottled beer. This distance should be shortened 10 to 15mm. It is alleged that this can effectively prevent the blasting of beer bottles. If you fill up your beer, you don’t have to worry about a glass bottle explosion. This tends to break bottles due to the expansion of the water in the bottle, as the volume increases by 1% when the water temperature reaches 45 degrees.