Ball 80100 Mini Jars 4-oz 4 Pack. The Ball 4 oz. Mini Storage Jar is 75% smaller than the iconic Ball Regular Mouth Pint Jar, but has 100% of the style. The Mini is great for dry herb storage and crafting and is a great solution for people who want to to control their clutter. The one-piece metal lids and glass jars are BPA-free entirely made in the USA.