The Shoebox Tek -----------> Before we begin, thanks must be given to Doc_T for all of his work on these smaller fruiting chambers. In the various methods that I have used to grow cubes, these shoeboxes have been the most successful. I believe that the deep substrate and high spawn ratio provide an optimal foundation for the mushrooms to grow from. I am getting a bit ahead of myself here, so let's begin at square one. Building the Spawn Tub 1. Buy a pair of plastic shoeboxes. I use the Hefty brand 6.5qt which are available at many major home improvement centers. Don't forget to grab the lids. 2. Buy a roll of duct tape. I like the black kind, it looks cool. 3. Start off by taping up the bottom. 4. Tape off the short sides. I use the plastic reinforcements on the short side as a guide. 5. Finish up by taping off the long sides. Congrats! The spawn tub is complete.