Slot Bin or Locking Slot Chest

A one way storage box (inspired by a mailbox) where a player could insert items into it by using the place item button while targeting it's front. On the rear end it can be opened and things can be taken from it. Mainly to be used as a sort of drop box or mailbox for a house. (Crafted by 7 wood planks and 1 wooden slab on either middle side). An alternative option is a locked slot box where items can be dropped inside from the top but only opened by a key unique to that box (crafted at the same time as the box, I figure it can be crafted as 8 wood planks surrounding 1 gold ingot). Instead of crafting one thing that takes up 2 inventory spaces, the key could be attached to the chest in your inventory and is kept when you place the chest. You have to hold the key to open the chest and the key cannot be placed inside. (But could be placed inside other locked chests not belonging to that key?) Breaking the chest would unload its contents just like any other chest. I'm not sure the practicality of either of these ideas but I think they'd be fun little extras for playing the game with friends or for adventure purposes. (yes I saw the locked chest forum with 50 something votes, this is a more detailed description with a sort of different application as this idea involves it being slotted so you can still insert items just not remove them.)