Recently I saw an idea on Pinterest to use a towel bar to store tank tops. It is a 3 bar towel rack that has bars that swivel. The post on Pinterest mentioned one from IKEA for about $20. I got this one at Fleet Farm for about $3.50.
This is a way to store your tanktops without taking drawer space and it is easy to see all of them at one time.
You could also use this idea for other items such as scarves and belts.