Jews take droplets out of their wine glasses during the Passover Seder in order to acknowledge the pain and suffering that the Egyptians underwent for the Israelites (the Jews' Ancestors) to attain their freedom. It is critical to acknowledge the humanity of all people, not just those of your own tribe or group and Judaism uses the removal of wine as a symbol of this fact.
Salt water
When you dip your finger into cold water, heat is transferred from your finger to the water. This transfer of heat causes your finger to feel cold.
wine because jeuse handed out wine at his last meal
On festivals such as Passover, wine is had.
Yes, and there are Kosher for Passover wines.
dip your finger in it
You do not dip anything on Purim. You are referring to the holiday of Passover, and the vegeteble is called Karpas (כרפס)
Yes, it can be since it is made from wine, which can be Kosher for passover if created under appropriate supervision. The bottle would require a kosher for Passover hechsher.
you need a wine glass for starters, you wet your finger, and you circle the wine glass with your finger, after the first circle. youll heall a faint note, wet your finger again and perform the circle once again, the wine glass SINGS
A kiddish cup is an ornate cup used to hold wine being blessed. There is not a specific kiddish cup for Passover.
because God wanted you to have a dip in your head.
The Torah (Exodus ch.12) specifies matzoh, bitter hers and the meat of the pesach-sacrifice. Other foods are not mentioned, but wine, vegetables and fruits were probably on the menu.