Step 1: You Will Need
1 cigar tube
a dremel tool with
_ a heavy duty cut off wheel
_ a small drill bit
a hot glue gun, and glue
be sure to take the necessary safety precautions- goggles for sure, and it would be a good idea to use a dust catching glove box: https://www.instructables.com/id/Dust-catching-Glove-Box/ because there will be metal shavings flying around
Step 2: Prepare the Can
Using the cut off wheel, make an X in the circle.
Using a pair of pliers (or a screwdriver, or anything but your fingers, really) push in the 'corners' that you made.
Step 3: Prepare the Cigar Tube
Then, put the cigar tube open end in, until it's a 'good' amount in (wherever you want it to be, really).
Mark that with a permanent marker.
User your dremel tool to cut three sides of a rectangle out of the cigar tube (see images)- you'll total two cuts.
Fold the newly cut tab up, and out.
Step 4: Put the Cigar Tube in the Can.
Fill the can with water to find any leaks.
Step 5: Cut the Top, Drill Ths Sprinkle Holes!
make sure they are wide, and have lots of space- the picture I've got show a set of holes that are too small, and too close together!