Day 251 of #LMB365 shows odour delivery manifolds built by the LMB’s Technical Instrumentation Workshop for Shahar Frechter in Greg Jefferis’ lab. The system was developed to synchronise odour selection for the study of neural circuits and behaviour in Drosophila. The polymer manifolds can each hold up to eight flasks (eight odours) and the control box can handle up to eight manifolds, allowing up to sixty four independent odour channels.