Supersonic Solvent Supplies Reduces Echo Skill Cooldown of a selected Resonator in the team by 30% for 180s. Only effective on your own Resonators in Co-op Mode.

A solid solvent made using a special process allows the user to use Echo Forte more frequently. “I run faster after taking this, which means I must have gotten lighter, which means I have gotten thinner... So does it mean it’s also a weight-loss product?”
Sources
Synthesis - Potion Making