These glass jars come with ball shape corks to keep air out. These are ergonomically designed to securely protect the inside content from being damp. The bundle includes 4 glass jars with cork ball lids - 2 large & 2 medium. The large jars are designed to store laundry detergent & fabric softener, and the medium jars to store detergent pods & scent booster. This bundle lets you keep your laundry room organized and adds to your space's decor.