How would I rotate a mesh parts so it stays together?

So I am trying to rotate all three mesh parts at the same time but also so the shape stays intacted here my script:

local CB = script.Parent.CoffeeBody
local CT = script.Parent.CoffeeTopp
local CH = script.Parent.CoffeeHandle

while wait() do

	CB.Orientation = CB.Orientation + Vector3.new(0,.1,0)
	CT.Orientation = CT.Orientation + Vector3.new(0,.1,0)
	CH.Orientation = CH.Orientation + Vector3.new(0,.1,0)

end

it rotates it but it does not do it all together it rotates each one separately so it does not stay in tact

So what you could do is model the 3 seperate parts by holding shift and clicking and selecting all three.

However you should put something in the direct center of it all, select that part as well with the 3 other parts, and make it a model.

Go to view, go to properties, select the model, and in properties it should say "PrimaryPart". Press that, then press the block in the center.

Enter a script by right clicking the model, press select object, type script, and press to insert. Then proceed to type:

while true do
script.Parent:SetPrimaryPartCFrame(script.Parent:GetPrimaryPartCFrame()*CFrame.fromEulerAnglesXYZ(0,0,0))
wait()
	end

Change the AnglesXYZ(0,0,0)) To the axis you want, so like .1,0,0 should spin on the X axis if I am correct.

After that it should be done.