The continuous production "on demand" of large polymerized objects is presented using a versatile, easy to implement and low cost "millifluidic" reactor. Over microfluidic devices, the present set-up offers two considerable advantages: (i) much larger particles are produced with a very good control of sizes and shapes and (ii) no lithography is required for its design. Considering the high modularity of this synthetic pathway, "tubular millifluidic" appears as a new concept of synthesizing particles with a strong control over final object sizes, monodispersity and aspect ratio. The possibility to reach a high scale production makes it a promising production tools for the industry. (c) 2007 Elsevier Ltd. All rights reserved.