Honeycombs have long been known to offer interesting properties, such as low mass-weight ratio, energy absorption, and mechanical and acoustic damping; but historically have been limited in geometry due to manufacturing constraints. Hexagonal honeycombs, like bees make, can be simply manufactured from sheets of material such as cardboard or aluminium. In contrast, triangle-based honeycombs are more difficult to manufacture, for example when used in rocket housings they are cut from large blocks of aluminium, which is wasteful and expensive.