We travel about 75% of the time (sadly, not now) in our 17-foot campervan so space is at a premium. We try not to have leftovers but occasionally we do so these containers will be very handy for us when this happens. They may also be good for packing trail mix in our backpacks. Because I bought them for our van, I have not put them to the test for leaks, etc. but I do appreciate that they are dishwasher safe. They are washed and in our van, just waiting for when it is safe to travel again.
If I decide to share with my daughter, I would think they would be excellent for packing snacks for our granddaughter.