I don't know anything about Ego drip tips unless it uses standard 510 drip tips. I tried two - a clear colored plastic one and an aluminum one. Drip tips are best used with manual (pushbutton) batteries that do not have a hole in the middle of their threaded end (because hole = juice could get in the battery and kill it unless you are super careful). You attach the drip tip to the atomizer instead of attaching a cart. Then you drip 2-3 drops to start into the wide mouthhole of the drip tip, maybe puff in lightly to help it go down to the atty, then start vaping using the drip tip as your mouthpiece. When the vapor gets low, add 1-2 drops. If you get too much juice in there, take your atty off and blow it out into a tissue and check for mess at the battery connection.
I think the juice slips down inside easier with a metal drip tip. The clear plastic works but the juice sometimes got stuck and didn't go down so I kept getting a mouthful of juice. The Delrin tyoe of plastic might be better than plain plastic - I don't know. I liked my aluminum one and some people like steel.
I drip when with my KR8 battery and a 901 atty when I want to try a bunch of flavors I got. But the some flavors are hard to get rid of in the atty - ginger ale, spices, etc - so they sort of color the flavor of everything after. The 901 is a long atty tube so I guess the flavor gets on the inside. When I wash the atty it will get those flavors out. I may just use a cart next time for my ginger ale, mad chai, and morgans eggnog juices.