3L umufuka-mu gasanduku ni ubwoko bwo gupakira bukoreshwa mumazi nka vino, amazi cyangwa ibindi binyobwa.Ubusanzwe igizwe numufuka wa plastiki wuzuye amazi hanyuma ugashyirwa mubikarito.Igikapu-mu-gasanduku gishushanya koroshya kubika no kugabura kuko ibika ibicuruzwa kandi muri rusange byoroshye kubyitwaramo.Ubu bwoko bwo gupakira bukoreshwa mubwinshi bwamazi kandi burazwi cyane munganda zikora divayi kubushobozi bwayo bwo kongera igihe cyibicuruzwa bimaze gufungurwa.