Batho ba bile ba ipapisitse le ho hlahloba foromo le khetho ea lintho tse bonahalang tsa ho paka lithethefatsi, 'me u ikemiselitse ho sebelisa e' ngoe ea thepa e loketseng ea phaello e loketseng ho sebelisa lithethefatsi haholo ho isa tekanyong e kholo haholo.

Ho tloha mathoasong a lekholo la bo20 la lilemo, Batho ba ne ba qala polasetiki pele, pampiri, le mekhoa e meng ea ho sephutheloana meriana, Empa mekhoa ena ha e na bonnete, Meriana e thata ho boloka nako e telele, mme meriana e bonolo ho ba mongobo ebile ea qhibiliha.

Ka tsoelo-pele ea theknoloji le tšebeliso ea lisebelisoa, Batho ba khetha ho theola tšepe ka likarolo tse tšesaane haholo le seaparo se holimo, e ka sebelisoang e le thepa e ntle ea pakete. Ka ho hlahloba, Batho ba fumane hore aluminium alloy alloy a ka sebelisoa e le thepa e ntle ea lifofane ka mor'a ho khaoloa foil.

Kaha batho ba ile ba qala ho sebelisa foil aluminium e le thepa ea meriana, Mokhoa ona o ntse o tsoela pele ho fihlela kajeno. Hona joale ts'ebetso ea thepa ea meriana ea aluminium ea foil ea foil e sentse e se e le teng ka likarolo tsohle, hape e ntse e tsamaisana le mekhoa ea batho.