I found jars at Micheals and hobby lobby...not really mason jars, but have the metal type lids. They have all different sizes. If you have the kind of lid that is two pieces you can use a crop-a-dile and punch holes. (The crop-a-dile will punch thru anything!) On the ones that have plastic lids or one piece metal lids I used my husbands drill, use a really small bit on plastic ones to start the hole with, then use the size you want...called a pilot hole, keeps your lid from cracking...darn husbands are good for something!