A cup can refer to a variety of different measurements (see Cup (unit) - Wikipedia). The cup OP referenced is a metric cup, a US customary cup is 8 US fluid ounces. Measuring cups can come labelled using cups as a unit, usually including a whole cup, and that is presumably what OP was referring to.

Well, the good news is that according to this list, your instance already blocks Threads.

10 minutes based on my experience.

To give a theological answer, no. A lich is usually understood as a sorcerer who has achieved an undead state or immortality, usually by binding their soul to the corporeal world in a phylactery. That does not apply in Jesus’ case, since he did not pursue any sort of magic to avoid death, much less binding his soul to a phylactery. The resurrection of Jesus was a supernatural act of God, restoring Jesus to true life.

As to the second part of your question, I was not aware that holy water harming liches was a common trope in fiction (it is usually seen in reference to vampires), but even if it is applied to undead more widely, we have established that Jesus was restored to true life, not to any form of unnatural undeath. Moreover, holiness comes from God (that which is holy is set apart for God), and Jesus is fully God, so contact with holy things would not harm him. Indeed, Christ is now in the true holy place in heaven (Hebrews 9:24), which we can only enter when cleansed by his blood (Hebrews 10:19-22).