Lime syrup is a must-have ingredient in your fridge for cocktails and mocktails. It adds a slight almost spicy sourness to cocktails and is also great as a dash of sweetness in a G&T. You can buy readymade but homemade is best. It is also so easy to make and keeps for weeks in your fridge that it makes sense to make to own. Your homemade syrup will never be clear unless you are super patient enough to strain it through a coffee filter and even then it may be a little cloudy. But neither will it be suspiciously bright green like some of the commercial ones.