I had a quick go at recreating the sound, because it is a nice one. It doesn't sound exactly like the original and the tune's wrong, because I did it from memory, but it demonstrates one way of getting that sound.
Standard water drop sample, resynthesised twice in Harmor with a 50-50 mix between A and B. They both have some reverb, harmonising, and compression (it's easy to overdo all of those), and one has a basic pitch envelope that makes it start a few tones down and rise to it's pitch pretty quickly.
It looks like private links don't work with widgets, so you'll have to click through, sorry.