In the refrigerator, it will last a good five days. If you would like it to last longer than that, you can freeze it. Just store it in a freezer bag or airtight container, pressing out as much air as you possibly can and chuck it in the freezer. It should last 3 months in the freezer, and to defrost, just place it in the fridge. Although, you can save yourself all this trouble and just store the ingredients and whip up a fresh batch when needed. We recommend you for the latter.