Amazon offers Prime members the Ball Jar 4-oz. Crystal Jelly Jars 12-Pack for $8.47 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $8.99.) That's the lowest total price we could find by $2. They come with bands and sealing lids.

Orders placed by December 22 are guaranteed to arrive in time for Christmas via Prime shipping; otherwise, choose Standard shipping and place your order by December 19 for guaranteed delivery.