Bottle Feeding and Night Sleeping

My 6 month old daughter was sick about 6 weeks ago with a viral infection since then she has not slept through the night. We are back to waking every 3-4 hours for a bottle and yet during the day Im lucky if she drinks 600ml. But she loves her solids. She might not take a bottle but she will eat breaky/lunch/dinner solids. With her only wanting about 150ml of formula at a time how do I go about increasing how much she drinks especially before bed to try and have her sleep for longer periods. Any suggestions greatly appreciated.