Imashini ebyiri yerekana amabara ya firime igizwe na screw ebyiri numutwe umwe upfa, ifata igikoresho cyibikoresho bibiri bya plastiki bitandukanye, bishobora guhanagura ubwoko butandukanye bwimifuka yimyenda yimyenda (igikapu cyo guhaha), irashobora kubona imifuka yamabara idacapwe, hamwe nibintu nkibi nkamabara meza, impuzandengo yumurongo, imiterere yumvikana, tekinoroji yambere, ndetse no gusubiza hamwe nibisohoka byinshi.