Would this tank work for a Betta?

I have a small tank at my house that I was going to use for meal worms but I decided not to, so it has never been used. It is not this exact one, but it is just about the same size and all, just a different brand.

I am thinking about getting a Betta for my desk at work. Do you think this tank would be of fair size for a Betta?
I always see them in tiny cups and they have such small tanks just for Bettas, but I hate the thought of keeping one in such a confined space. I don't even know if I like the sixe of this one.

http://www.petco.com/product_info.asp?familyid=12031&sku=4258379648&tab =3&dept_id=1007&c1=1005&c2=1007&c3=&ct1=Aquariums+ %26+Furniture&ct2=Aquariums+%2D+Acrylic&ct3=

That looks like the size of one of my tanks. I think it should be okay.

I have my females in their own 1-1.5 gallon tanks. The male is spoiled and has his own 10 gallon tank. :p