We have already started handing these out at our booths and they go like crazy! I would suggest putting up a sign that states that they are hot/cold packs. Or put a sticker on each package stating what they are. We work with families that have young children and babies. A few people questioned if they were teething toys. Others thought they were stress relievers. But when we told them what they were, they loved them. If you have an outdoor booth on a hot day, try keeping them cold in a cooler and watch them disappear when people come by. I would also suggest that you leave them in the package with the directions.