You shouldn't put all your eggs in one basket, but you can definitely depend on this model!
Here's a simple picnic basket which is also my first attempt at making movable parts (hinges). In order to get the lid, you just have to snap the hinges onto those on the basket itself.
Depending on what size you scale it to, it can have different uses. The current size is approximately 11.2cm by 7.7cm by 10.6cm, so it can be used for holding tiny trinkets. If you scale it up a little, you can use it as packaging for gifts; if you scale it up some more, perhaps you can use it as an actual picnic basket. On the other hand, if you scale it down, you might even be able to use it as a pendant and keep secret messages inside. ;)
Note: I apologise for not printing these out as I don't own a 3D printer, and I cannot use my school's. As such, I am also very sorry if the hinges do not work, but I did research on them and checked that part of the model quite a number of times, so... let's hope for the best.