Jack Daniel's CubeTwo opposite sides show the "Old No. 7" logo. The other four sides all show the same Jack Daniel's label.
Jacobs Krönung CubeThis is a cube which was sold by german coffee manifacturer "Jacob's Krönung". It shows a cup of coffee on 5 sides, and a crown on the 6th side.
JVC Rubik's CubeA nicely packaged promotional Rubik's Cube featuring JVC and a soccer theme.
Keroppi Key ChainThis key chain puzzle features the popular Sanrio character Keroppi.
Keyboard 3x3x3 CubeA standard 3x3x3 with keyboard keys attached. It is available in different colours. A bandaged version also exists.
Kool Aid - Country TimeOn the base says "Workin' Harder For You in '82", and an image of the Kool Aid Pitcher and also the Country Time Lemonade Lemon. The cube has references to General Foods, Kool-Aid, Country Time Lemonade.
Kraft CorporationSides contain these words: Jet Puffed Marshmallows, Ice Cream Toppings, Marshmallow Cream, Carmels and Kraft.