Some medication has to be refrigerated and also has to be kept away from children, and those two requirements usually fight each other because a fridge is exactly where a curious child goes. A lockable box inside the fridge resolves it without a locked fridge.
The other use is less serious and more common: a share house where food goes missing. A box with a code on it ends the conversation entirely, which is a cheaper fix than moving out. It holds a useful amount rather than being a token container.
A three-digit combination means no key for you to lose, leave at work, or hide somewhere a child will eventually find. You set the code yourself and tell anyone who needs access, which suits a household where more than one of you manages someone's medication.
It is food-grade plastic with a transparent front, so you can see what is inside without opening it. Beyond the fridge it works in a cupboard or a bag for the same purpose, which makes it useful when travelling with medication.
This suits households with young children and medication that must stay cold, carers managing someone else's prescriptions, and share houses where the fridge is a source of ongoing friction. It is practical rather than charming, and in the right situation genuinely valuable.
Measure the fridge shelf before buying, since a box like this needs a clear run and some fridges have shelves too shallow to take it. Worth noting too that it is a deterrent rather than a safe, which is the right level for keeping children out.
✔ Three-digit combination, so there is no key to lose
✔ Keeps refrigerated medication out of children's reach
✔ Ends share house food disputes
✔ Food-grade plastic with a clear front panel
✔ Works in a cupboard or travel bag too