He sounds gorgeous... but please reconsider keeping him in the plant vase. Bettas need to be able to come up for air regularly, as well as to eat their pellets/frozen food etc., and it is very difficult for them to do so with the plant and roots blocking the opening.

You might want to look over this page about the betta vase:

http://bettatalk.com/betta_in_a_vase.htm

Of course, do not take this to mean I am scolding and criticizing you. Most people see them sold for fish and figure if they are sold for fish, it must be safe!

However, a betta vase CAN be done if it is done correctly, but it takes a lot of work and almost daily water changes. This site explained a way to properly set it up if you really want to have a betta in a vase,

http://honors.montana.edu/~weif/firsttank/vase.phtml

but I would still recommend getting at least a 1-gallon bowl or tank setup and letting him live without the vase and plant

EDIT: I missed your final comment about feeding and taking care of it, sorry about that. However I'll leave all the information up in case it is of some help to you