Glass Funnel short stem 100mm diameter

I use it to pour water from a demi-john to several 1 litre bottles but I have to keep it away from the lip of the bottles otherwise a vaccuum developes and the water flow slows/stops. I've solved the problem with a champagne-style-wire-cage-thing and it works really well - its much faster than a smaller one I had for over a year but it broke when I was over-enthusiastically cleaning it with a bottle brush.