This is a cut flower preservative. There are 30 packets. I buy flowers every week, but I arrange them differently at home, so I'm selling the ones I've accumulated! Recently, they've been sold as one packet per 300ml dilution, but the ones I'm selling are one packet per 500ml. They are stored at home in a cool, dark place. Please understand this before purchasing. I will use recycled materials for shipping. Thank you for looking. I'm decluttering. I may be slow to respond, but I will do my best to be courteous. Thank you very much.