With all of the shots, insulin cartridges, needles, lancets, etc that are used on a daily basis we need somewhere to dispose of these items properly. For my state, we can use laundry detergent bottles. So, if I come asking you for any clean and empty laundry detergent bottles, you'll understand. These empty insulin pens have to go somewhere! :)
No one in my house likes the smell of insulin, so these pens had to be emptied when no one else was home which is almost never!