Umupfundikizo woroshye, Umupfundikizo wa Airtight: Byoroshye-gukoresha, umupfundikizo utanyerera ni umuyaga kugirango uhagarike urumuri kugirango ubungabunge ibirungo byawe, ibyatsi, ikawa, nicyayi. Ingano irashobora gutegurwa muguhuza uruganda, buri kibindi kibika gishobora gufata ibiryo nka kawa, icyayi cyangwa ibirungo, kandi buri tini irashobora kugira umupfundikizo, ibereye cyane ibyatsi nibirungo. Amabati yicyayi afite byinshi akoresha, kandi arashobora kandi gufata ubukorikori buto, udukariso, kwisiga, nibindi byoroshye kubyitaho, gusa bisukuye nigitambaro gitose.