Weed Star Diffusers
Unlike a traditional down-stem a diffuser uses an open ended system that gives much better distribution to the smoke and results in a much smoother smoke. Weed Star has an excellent range of diffusers for all different sizes.
Instead of using a one big hole to suck the subtance through these Weed Star diffusers use many smaller punctured holes to ensure a consistantly smooth smoke that also results in less wastage!
You can simply swap your regular downstem with one of these if you wish to upgrade - it's a simple swap and is well worth it.