Icupa ryizunguruka ryikirahure ni amahitamo azwi cyane kubika no gukwirakwiza ibintu bitandukanye, nk'amavuta, isosi, n'ibirungo. Ubusanzwe amacupa akozwe mubirahuri byirabura cyangwa amber, kandi ibirimo birashobora kuboneka byoroshye. Amacupa asanzwe afite ibikoresho bya screw cyangwa cork kugirango ibikubiyemo bishya.