Squelch - Modular Synth Sample Pack by Bleeps+Loops offers a variety of modular-sourced liquid sounds.
If you are looking for high-quality squelch samples or tutorials to achieve that sound, you might find these alternatives helpful: Download Aturax's Squelch Pack zip
While "Aturax" appears as a producer on SoundCloud , there is currently no direct public link or widely indexed post for a specific "Squelch Pack" under that exact name in major sample repositories. Squelch - Modular Synth Sample Pack by Bleeps+Loops