From Webkinz Insider Wiki
Slipinsip is a blender recipe made with bananas, iced tea, and jelly.
It was solved by Webkinz Insider member cutiepie297 on October 7, 2007.
This recipe was solved two months and two days after its release date.
The Webkinz Newz had this to say about the recipe: "If you can catch this drink, you're sure to enjoy it! Made of all sorts of sweet treats, this is a beverage to savor."