Store dry ice in an insulated container - the better the insulation, the slower the sublimation to CO₂ gas. The best container is the safety box that the dry ice is sent in. Do not store dry ice in an airtight container or glass container. The sublimation of dry ice into CO₂ gas causes an airtight container to expand and burst.
It is very important to always have proper air ventilation where dry ice is stored because it sublimates into large amounts of carbon dioxide gas. This gas will replace oxygenated air, which can cause you to inhale too much carbon dioxide gas. A small amount can result in headache and rapid breathing (hypercapnia), but more serious consequences such as suffocation can also occur.