V necks actually are listed as acceptable in the look book! It just says no "plunging necklines" with a picture of a woman wearing a v neck that goes down below her breasts.

However if you want to get some non V-neck tops, I recommend checking out the men's section if you haven't. I got my work shirts fairly cheap in the men's departments of target and old navy. I also recommend sweat wicking fabrics. Not a must, but more comfortable when you're busting ass.

You can find the starbucks dress code online by googling "starbucks lookbook"

Good luck and have a great first day :)

The coffee gear website has decently affordable and dress code approved work shirts.