Especially for the storage of straws in the liquid nitrogen we have developed a special twisting canister. The big advantage of this system is that one can work with the canisters as in the small vessels when retrieving goblets/visotubes. The inventory can be moved from the small canisters directly into the new canisters in the bigger vessel. The canisters can twist independently per level from each other when retrieving straws so you don’t need to remove the layers above the lower goblet, this works quicker. The inventory system comes with a frame witch has partitions for each individual canister. We can make these for any type of vessel old or new.