I got tired of dealing with drip irrigation sprayers either not putting the water where I wanted or falling over due to the shallow nature of the pots I am using. So I whipped this up and it works great. This is designed for ¼ inch (6.35 mm) drip irrigation tubing.

There are two small dividers internal to the tube that seem to slow the water down and have to not spray out too hard. I control the flow off the actual sprinkler manifold, but a pressure compensating emitter before this would probably work as well.  

I would recommend printing in a light color PETG filament if your area gets warm. When printing use supports and select the “On build plate only” option otherwise it will fill the interior with supports which would restrict the water flow even more.