So now that water containers can absorb droplets I put one on a leaf next to the oak garden lamp where water droplets fall sometimes (though it seems to be nerfed) and came back to see Not the container being filled up but a water drop glitched inside it.

46 minutes ago, RareWashington said:

So now that water containers can absorb droplets I put one on a leaf next to the oak garden lamp where water droplets fall sometimes (though it seems to be nerfed) and came back to see Not the container being filled up but a water drop glitched inside it.

I have yet to see the water container fill up by itself.  

You definitely have to fill it up with your canteen. I have 3 dew collectors at almost all of my bases. I use them to fill up my containers.