Giver script help?

Okay I have created this script and it's working.

local coffee = script.Parent.Parent
local function OnMouseClick(Player)
	while true do
	coffee = script.Parent.Parent
	if Player == nil then return end
	coffee = game.ServerStorage.IceCoffee:Clone()
	if Player.Backpack:FindFirstChild(coffee.Name) ~= nil then return end
	coffee.Parent = Player.Backpack
	print("Enjoy your coffee!")
	end
	
end

script.Parent.MouseClick:connect(OnMouseClick)

But it only will let you click it once per life. I was wondering how I could fix this.