It is not an educational tool but I believe water+tea/coffee cups are essential items for all teachers or office employees. I found it in Kickstarter. The idea is very simple yet very creative. For example, as a teacher, I would like to carry as less items as possible. I would like to have either my water bottle or my coffee mug. This item does both. You can carry both and you will not worry if you are missing one. I am approaching this iteam as costumer not as an investor. I have to change my mind set before start investing in it.