Cryogenic Tubes were the things that kept people (like Philip J. Fry I) safely frozen until the time the person inside is to be released. It automatically starts with 1,000 years, but it seems that can be set ahead or behind by use of the dial. Without one, Philip I would not be in the year 3000. They use Cryogenics to work. There are a lot of these tubes in Applied Cryogenics.