- WONDER SHAKES MILKSHAKE KIT 2.3 FL.OZ. NEW IN JAR. Build your own milkshake,everything you need is in this Mason jar.The jar contains choclate syrup,Junior mints,and choclate sprinkles on the inside and the outside is the Mason jar and green lid with green stripe straw and a straw cap. Easy instructions are on the inside of card and on the outside of jar. This would be a fun thing to do with kids they would love it. This would make a nice little gift for someone,Made in China