Individual preference.  A lot of what I buy is intended for long-term storage, because it's glp-'1s or things I expect to use a long time and want to protect against unavailability, so I pack three kits into a 13.5 oz food-container thermos, and pack in some silica packets at the top.  The thermos is airtight and protects against any temperature swings and with the silica packets, the humidity is pretty controlled.  It also makes it very easy to pull what I want without things shuffling around in the freezer; I know if I want klow, I'm looking for a green one, and both the side and the top are labelled so I can spot it quickly.  And the thermoses are very compact and easy to pack together, so my space is controlled.  Some of them won't be opened for years.