Eurosonic Vacuum?Food Flask?is an ideal gift for grown-ups and kids alike when going to school work or take along when on a road or field trip. Its vacuum food container and flask keeps your beverage and food hot or cold for a minimum of 24 hours and its stainless steel design makes it durable and easy to maintain.Eurosonic Vacuum Food Flask?is an ideal gift for grown-ups and kids alike when going to school work or take along when on a road or field trip. Its vacuum food container and flask keeps your beverage and food hot or cold for a minimum of? hours and its stainless steel design makes it durable and easy to maintain.?Food Flask?is an ideal gift for grown-ups and kids alike when going to school work or take along when on a road or field trip. Its vacuum food container and flask keeps your beverage and food hot or cold for a minimum of? hours and its stainless steel design makes it durable and easy to maintain.