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 couldn’t really reach the bottom. You don’t need to coat the actual bottom of the jar, but a small paintbrush helped get the lower part.
Holding the jar horizontally, add a spoonful of sprinkles and slowly roll the jar so they’ll slide around and stick to the inside. 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 don’t stick.
Repeat with the second jar.