Firefly Latern on Etsy-- But a super easy DIY project. Mason jars with a small battery operated light string and some dried Spanish moss. Maybe even frost the glass and paint the lid for some added style.
Quart Mason Jars With Warm White Fairy Lights, Set of 3
Create the appearance of fireflies in a jar with this unique light display. Simply feed the light strand through the mouth of the Mason Jar and tape the compact battery pack to the bottom of the lid and you suddenly have a beautiful light display suitable for weddings, events and home décor. Display them as centerpieces, pathway lighting, or hang them from shepherd hooks, branches, or ceilings.