A system for lyophilizing material, the system comprising: a freeze drying machine defining a chamber; a device (100, 300) for storing a material to be lyophilized, the device being adapted to be disposed in the chamber and comprising: a tub comprising: a support panel, a sidewall attached to and extending from the support panel, the sidewall and the support panel defining a storage space for accommodating the material, and an opening defined by a rim of the sidewall that is spaced away from the support panel; a cover removably disposed adjacent to the rim of the sidewall for closing the opening; the system being characterized in that the device further comprises at least one lifter device (110a-110d, 210, 310) disposed between the support panel and the cover and comprising a reservoir (150, 350) and at least one movable wall (156, 356), the reservoir defining a sealed cavity (152, 252, 352) containing a fluid, the at least one movable wall in operable communication with the fluid in the sealed cavity and operatively engaging the cover to displace the cover away from the rim and into an open position when the at least one lifter device is subject to an ambient pressure that is less than the pressure of the fluid in the sealed cavity; and a plurality of biasing members (108a-108h) biasing the cover into a closed position, wherein the biasing members are coupled to the cover and the sidewall and spaced about the periphery of the tub. a freeze drying machine defining a chamber; a device (100, 300) for storing a material to be lyophilized, the device being adapted to be disposed in the chamber and comprising: a tub comprising: a support panel, a sidewall attached to and extending from the support panel, the sidewall and the support panel defining a storage space for accommodating the material, and an opening defined by a rim of the sidewall that is spaced away from the support panel; a cover removably disposed adjacent to the rim of the sidewall for closing the opening; the system being characterized in that the device further comprises at least one lifter device (110a-110d, 210, 310) disposed between the support panel and the cover and comprising a reservoir (150, 350) and at least one movable wall (156, 356), the reservoir defining a sealed cavity (152, 252, 352) containing a fluid, the at least one movable wall in operable communication with the fluid in the sealed cavity and operatively engaging the cover to displace the cover away from the rim and into an open position when the at least one lifter device is subject to an ambient pressure that is less than the pressure of the fluid in the sealed cavity; and a plurality of biasing members (108a-108h) biasing the cover into a closed position, wherein the biasing members are coupled to the cover and the sidewall and spaced about the periphery of the tub. a tub comprising: a support panel, a sidewall attached to and extending from the support panel, the sidewall and the support panel defining a storage space for accommodating the material, and an opening defined by a rim of the sidewall that is spaced away from the support panel; a support panel, a sidewall attached to and extending from the support panel, the sidewall and the support panel defining a storage space for accommodating the material, and an opening defined by a rim of the sidewall that is spaced away from the support panel; a cover removably disposed adjacent to the rim of the sidewall for closing the opening; the system being characterized in that the device further comprises at least one lifter device (110a-110d, 210, 310) disposed between the support panel and the cover and comprising a reservoir (150, 350) and at least one movable wall (156, 356), the reservoir defining a sealed cavity (152, 252, 352) containing a fluid, the at least one movable wall in operable communication with the fluid in the sealed cavity and operatively engaging the cover to displace the cover away from the rim and into an open position when the at least one lifter device is subject to an ambient pressure that is less than the pressure of the fluid in the sealed cavity; and a plurality of biasing members (108a-108h) biasing the cover into a closed position, wherein the biasing members are coupled to the cover and the sidewall and spaced about the periphery of the tub.