Combining 2 tool scripts?

This seems like a simple matter of defining your variables

It's fine to have more than one script, but if you want two, I have no room to argue.

This is quite easy,

First, define the two ClickDetectors,

--Regular script in ServerScriptService, or anywhere in Workspace
local ClickDetector1 = game.Workspace:WaitForChild("Part1"):WaitForChild("ClickDetector")
local ClickDetector2 = game.Workspace:WaitForChild("Part2"):WaitForChild("ClickDetector")

Great, now we just have to throw in your scripts, but substitute the script.Parent.ClickDetector with our new variables,

--Regular script in ServerScriptService, or anywhere in Workspace
local ClickDetector1 = game.Workspace:WaitForChild("Part1"):WaitForChild("ClickDetector")
local ClickDetector2 = game.Workspace:WaitForChild("Part2"):WaitForChild("ClickDetector")

ClickDetector1.MouseClick:connect(function(player)
local cup = script.Parent.Parent:FindFirstChild("Cup")
    cup.CFrame = CFrame.new (cup.CFrame.X,cup.CFrame.Y-0.0,cup.CFrame.Z)
    local tool = script.Tool:clone()
    local handle = script.Parent.Parent.Cup:clone()
    tool.Parent = player.Backpack
    handle.Parent = tool
    handle.Name = "Handle"
    tool.ToolTip = script.Parent.Parent.Name
    tool.Name = "Raw Hamburger"
    for _,two in pairs(tool:GetChildren()) do
        if two:IsA ("LocalScript") then
            two.Disabled = false    
            wait()      
        end
    end
    for i = 1,8 do
        cup.CFrame = CFrame.new(cup.CFrame.X,cup.CFrame.Y+0.0,cup.CFrame.Z)
        wait()
    end
end)

ClickDetector2.MouseClick:connect(function(player)
local Drink1 = script.Parent.Parent:FindFirstChild("Drink1")
    Drink1.CFrame = CFrame.new (Drink1.CFrame.X,Drink1.CFrame.Y-0.0,Drink1.CFrame.Z)
    local tool = script.Tool:clone()
    local handle = script.Parent.Parent.Drink1:clone()
    tool.Parent = player.Backpack
    handle.Parent = tool
    handle.Name = "Handle"
    tool.ToolTip = script.Parent.Parent.Name
    tool.Name = "Drink1"
    for _,two in pairs(tool:GetChildren()) do
        if two:IsA ("LocalScript") then
            two.Disabled = false    
            wait()      
        end
    end
    for i = 1,8 do
        Drink1.CFrame = CFrame.new(Drink1.CFrame.X,Drink1.CFrame.Y+0.0,Drink1.CFrame.Z)
        wait()
    end
end)

Now, that should work. However, I'm not 100% if this was what you wanted.

I hope I helped!

Good Luck!