Iceberg Egg

Iceberg Egg
Group Basket
Sub Group Spring Eggs
Tradeable No
Refundable No
Limited Edition No
Random Items from Iceberg Egg

Opening this gives you one or more of the following: Details in the MHWiki link below

Description
You can use this egg to chill your drinks, but maybe it would be better to just grab the loot from inside.
Mousehunt Wiki page