Also, you could use wax from old orun-usedcandles that you already have.
Or you could buy soy wax flakes, which is what I did.
All the supplies are relatively cheap, except for the wax flakes, which were $8.

Or more wax from old, broken or un-used candles I already have.
And youre going to hot glue the wick attachments to the bottom of the jars.
Then in a bowl, mix corn syrup and water.
Start with just one of the jars, and coat the inside with the corn syrup mixture.
First I tried using a folded paper towel, but couldnt really reach the bottom.
Add another spoonful and repeat until the inside is completely covered.
The paint brush will come in handy if there are any spot where the sprinkles dont stick.
Repeat with the second jar.