This ice pack is used for certain types of ceramic hides that have a space for an ice pack to help a hamster cool in warm summer days. We do not recommend using this in the enclosure out of the ceramic hides.
 
This ice pack fits well in the Bucastate Coconut Ceramic Hide as shown in picture.
 
These can also be used in the Bucatstate Castle Ceramic Hides. They have the space for 1-2 of these ice packs.
 
These are the same size as the blue version we had avaible before