How should i store this?

How much did you make? If you made as much as the link, it'll be good for 4 uses. Keep it in the fridge and it'll last for awhile (up to a month, throw it out if you haven't used it all by then), since it's only sugar and honey. You can make a large batch and use it to exfoliate your entire body when you're in the shower, it's nice for exfoliating feet too.