A sharps container is a rigid, puncture-resistant container with a tight lid, designed to hold used needles, pen needles, and syringes so nobody gets stuck. FDA-cleared sharps containers are sold at pharmacies and online. If you don't have one, the FDA says a heavy-duty plastic household container, such as an empty laundry detergent bottle, can stand in, as long as it closes tightly, stays upright and stable, resists leaks and punctures, and is clearly labeled as holding hazardous sharps.
Put used needles in right away, fill the container only about three-quarters full, and then follow your community's rules for getting rid of it (drop-off sites, mail-back programs, or household trash in some areas). Never put loose needles in the trash or recycling, and never recycle a full sharps container. See safe sharps disposal for GLP-1 injectors.