Botolo la Dewar limapangidwa makamaka ndi zigawo ziwiri, chidebe chamkati ndi chakunja, chokhala ndi vacuum wosanjikiza pakati pa zotengera ziwirizo zotsekera matenthedwe.
Botolo la Nitrogen Dewar Liquid limapangidwira kuti lisungidwe bwino komanso moyenera la nayitrogeni wamadzimadzi.
