Our ice packs are filled with a gel that is non-toxic and water soluble (but still not meant for human consumption). The manufacturer's recommendation is to put the entire ice pack in the trash. If you wish to recycle, we suggest cutting open the gel pack, squeezing the gel into your regular trash, and recycling the #4 plastic.
The ice packs are also reusable. You can keep them in your freezer for future use. Many organizations will also accept them as a donation. These include local rescue missions and boy scout & girl scout clubs.