Cajalada tuubada, sidoo kale loo yaqaancajalad duck, waa maro-ama cajalad-xasaasi ah oo cadaadis-xasaasi ah, oo badanaa lagu dahaadhay polyetylen. Waxa jira dhismayaal kala duwan oo isticmaalaya dib-u-celin iyo koollo kala duwan, ereyga 'cajalad tuubbada' waxaa badanaa loo isticmaalaa in lagu tilmaamo dhammaan noocyada cajaladaha dharka ee kala duwan ee ujeedooyin kala duwan.