Are the anwers all OK?

What would you like to drink?

I'll get the same as you.
I'll get the same as yours.
I'll get the same one as yours.
I'll get the same thing as you have.
I'll have what you're having.

Question

Are the anwers all OK?

What would you like to drink?

I'll get the same as you.
I'll get the same as yours. 
I'll get the same one as yours.
I'll get the same thing as you have.
I'll have what you're having.

Answer

Last one is best.

Or

I’ll have the same as you.

I’m English. Americans might be more likely to use “get”.

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