Your generous blood donation saves and improves lives. LifeSource will be on site for blood collections. Donate a pint of blood and receive a coupon for a pint of Culver's Frozen Custard. Donors must be at least 18 (16 and 17 with signed parental consent) and must weigh at least 110 pounds. Eat well and drink plenty of water before you arrive, and bring a photo ID with you.