seems to me like a good styrofoam alternative/competitor, but for floating like properties, it to have vacuums in the tubes right? That is certainly the difficu

seems to me like a good styrofoam alternative/competitor, but for floating like properties, it to have vacuums in the tubes right? That is certainly the difficult problem to make this truly be better than helium for some applications. On the other hand, maybe with the structure each small tube is under or is a vacuum.