Dilvac dewar flasks in containers,utilising the proven borosilicate glass inner vessels. Designed for safe use and transportation of liquid gases, all Dilvac Dewar flasks are manufactured to exacting standards and represent the highest quality units available today for laboratory use. Fitted in highest-quality stainless steel containers, therefore rust-free, anti-corrosive, all hygienic and strong. These Dewars have an all stainless steel lid with self-contained insulation, vent and handle. Toggle-clamps secure the lid to the body for safe transportation.