Question on 2x or Double Strength

I received my A314, IShine x2, & IH x2. How do you know that you received the double strength spray? It does not state double strength or 2x on the bottle?

Is it a ToGo Bottle? I know i have IShine x2 and IH x2 and it says X2 on the back.

Thanks John. There is a sticker on the bottom of the IS & IH that says x2.