Amacupa akozwe mu inshinge, nk'igice cy'ingenzi cy'ibikoresho bya pulasitiki byo kwisiga, akoreshwa cyane mu kwita ku ruhu no mu gupfunyika amavuta yo kwisiga bitewe n'inyungu zayo zose, harimo imiterere yoroshye, umusaruro mwiza, ikiguzi cyo kugenzura, ndetse n'imikorere myiza yo gufunga.

Polypropylene amacupa ya pulasitiki yo kwisiga Birangwa no kuba bitagaragara cyane cyangwa bitagaragara neza (harimo n'ibintu bitanga urumuri), ubucucike buke (bworoheje), birwanya cyane imiti (cyane cyane amavuta n'ibintu bisukura), birwanya ubushyuhe neza (bishobora gukurwamo umwuka), gukomera cyane, gukomera neza, no ku giciro gito. Ingorane zirimo ubwiza buke ugereranije na PETG/AS, kuba byoroshye mu bushyuhe buke, kwibasirwa n'imirasire ya UV (bisaba kongerwamo ibintu bitera imbaraga UV), no kuba bike cyane ku buso. Bishobora gukoreshwa mu macupa ya cream, amacupa yo kwisiga, amacupa ya shampoo, amacupa ya gel yo kwiyuhagira, imiyoboro y'amavuta, imipfundikizo, ibice bya pompe, nibindi, kandi ni bimwe mu bikoresho byo gushushanya amacupa yo kwisiga akoreshwa cyane.

Polyethylene amacupa ya pulasitiki yo kwisiga, ikozwe muri HDPE, irangwa no kuba idasobanutse neza cyangwa idasobanutse neza, ikomeye cyane, ikomera neza, irwanya imiti (cyane cyane aside na alkali), ihendutse, kandi yoroshye kuyitunganya. Ikunze gukoreshwa mu macupa manini ya cream, imipfundikizo, n'amacupa manini ya gel yo kwiyuhagira. LDPE/LLDPE irangwa n'imiterere yayo yoroshye, gukomera neza, no kubona neza kurusha HDPE. Ikunze gukoreshwa mu miyoboro, imipfundikizo y'amacupa, n'imiyoboro y'amacupa. Ishobora gushyirwa mu bipfunyiko by'ibikoresho by'isabune (gel yo kwiyuhagira, shampoo), amacupa ya cream, imipfundikizo itandukanye y'amacupa (cyane cyane imipfundikizo y'imbere/gaskets isaba gufungwa neza), n'imiyoboro.

PETG amacupa ya pulasitiki yo kwisiga Birangwa no kugira urumuri rwinshi, urumuri rwinshi (rugereranywa n'ikirahure), kudakora neza cyane, kudakora imiti, koroshya gucapa no gushariza (gucapa ushyushye, gucapa ecran, nibindi), no kongera gukoreshwa. Ubushyuhe bwo gutunganya ni buke ugereranije na PET. Ingaruka mbi ni uko ibiciro biri hejuru ugereranije na PP/PE, kudakora ubushyuhe buri hagati (ubusanzwe munsi ya 70°C), no kudakora neza ugereranije na AS. Bishobora gukoreshwa ku macupa yo mu bwoko bwa serum yo mu rwego rwo hejuru, amacupa ya toner, amacupa yo kwisiga, amacupa y'imibavu (iyo ushaka imiterere isa n'ikirahure), no gupakira ibintu bifite ibisabwa byinshi byo kwerekana. Ni amahitamo akunzwe cyane mu kongera icyubahiro cy'ibicuruzwa.

Ikozwe mu buryo bw'inshinge amacupa ya pulasitiki yo kwisiga ni amahitamo agezweho mu ikoranabuhanga, akoreshwa cyane, kandi ahendutse mu gupfunyika ibikoresho byo kwisiga. Gusobanukirwa neza imiterere y'ibikoresho, uburyo bikoreshwa, imiterere y'ibiciro, n'ibisabwa mu kugenzura ubuziranenge ni ingenzi ku bigo kugira ngo bihingemo gupfunyika bihuye n'ibyo bakeneye, bigire umutekano, byizewe kandi bihiganwa, kandi abaguzi bashobore gucunga neza uruhererekane rw'ibicuruzwa, kugenzura ikiguzi, no kugabanya ibyago.