OK, in the wiki it stats that this prize box last appeared in 2014. It also stats that it can appear in a surprise box which is around April yearly. The question is, does it regularly appear in every surprise box? Will there be any chance that the Confection Prize Box Promotion will appear again in the future?
Thanks.
The surprise boxes contain boxes that were released the previous year, they are marked with which year they are
https://wiki.spiralknights.com/Surprise_Box
It's possible they could reissue the old box, but doesn't seem likely, they know how much people are paying for mixmasters.