If you are a fan of Valve’s Portal game these Portal bookends could be the perfect gift for you and would be the perfect thing to keep your science manuals in order. They are constructed from aluminium and have been given a shiny finish and have non-slip rubber padding on the base.

If you have ever played or seen anything about Valves Portal game you will notice the left side features half of a test subject going through an orange portal and the right side features the other half of the test subject coming out the blue portal.

These great Portal bookends are now available to purchase from the Think Geek online store for $25.