Any items that can contains custom data cannot be put in the Tek Storage. Which includes perishable as @Brainpox mentioned, because they have a Spoil Timer field that won't be the same for all items. Snow Owl Pellet also have a Nitrogen field that won't be the same, etc. Same for gear, weapons, etc. since they can have different stats. However, there are a few issues with the Tek Storage that you should be warned about; If you are on official, or on a server that have fast decay for unsnap