Christmas Tree Water Fill/Level Check

I hated always crawling under the tree to

a)Check whether or not I needed to add water
b) checking to see when the water resevoir was full

SO, let's make something that will help us with both!

**UPDATE 29-Nov-2019***
I broke my existing funnel (stepped on it; oops!), so I thought I'd implement some improvements:
- Rotate the funnel bottom 45° as the hose's natural bend wants to have the funnel sit sideways.
- Added holes into the sides to allow me to mount my micro switch (