If you're a thrifty shopper, your best bet is this Zella Tank. It's a popular item, while not very pricey. In this price range, you can also check out this Soybu Tank. It's also a popular item and won't break the bank. Or you can opt for this Alo Tank. This item has all the potential to become a powerful player in your wardrobe.
For something in the middle of the price range, look no further than this Heather Tank. This item doesn't cost a fortune, but absolutely essential in your wardrobe.