Through our “Drops” campaign, local businesses can partner with MKBC to increase blood donations, recruit volunteers, and increase fundraising! What Are Drops? “Drops” is a communication and employee engagement program designed for organizations to engage and educate their employees on the importance of blood donation in our community. Miller-Keystone Blood Center will provide content for you to share with your employees monthly through your internal communication vehicles – whether through a newsletter, email distribution, social media, or digital display.