Ooze Siphon

This small glass vial, filled with a viscous, dark liquid, seems to pulsate slightly. When consumed, it grants advantage on Constitution saving throws for 1 hour, as the user gains enhanced resistance to toxins and poisons. However, once the effect ends, the user suffers disadvantage on their next Constitution saving throw due to a lingering, nauseous feeling brought on by the vile brew. This item is believed to be created by the Squelching Eye from the ooze that forms in its habitat, infused with the essence of the micro-organisms it consumes.