There are a lot of things that are funny about the amazon item “Hamster in the Cup Mobile Phone Box for Men Blue” - such as the fact that item is also available in “UNISEX PINK” or the fact that the other images on the page clearly indicate that the item in question is meant to be a pencil case, not a phone case (or phone “box” as the case may be):
But there is one thing that is not funny at all about this amazon item. And that is the fact that both it - and the guitar picks also shown above (offered by a seller named “Fffpp”) - are selling items that use an image created and owned by deviantart user cassiescrue. The items for sale are profiting off someone else’s intellectual/visual property and do not give credit or (I assume) any portion of their profits to the true owner of the image.
The original image is at https://www.deviantart.com/cassiescrue/art/Hamster-251012016