The best ways to use jars as Halloween decorations involve turning them into glowing lanterns or candle holders. Start by cleaning glass jars of any labels. Fill them with battery-operated candles, fairy lights, or real tea lights for ambiance. Adding a layer of colored tissue paper inside or wrapping the jar with twine creates visual texture and color diffusion. Arrange jars in clusters of three, five, or more for a striking group effect on porches, window sills, or tabletops. You can also paint spooky faces or designs onto jars with black paint for a jack-o’-lantern look without carving. These jar lanterns provide warm, eerie lighting, are renter-friendly, cost-effective, and reusable year after year. This technique adds mood and charm while elevating simple materials to designer status.