If you are on a limited budget, this Bishop + Young Tank will fit the bill. It's a great choice, while not very expensive. You might also want to look at this Soybu Tank. It's a product you'll love which also doesn't cost the earth.
If you can afford to spend a little more, we've got your back with this Halston Tank. This product is bound to become a total wardrobe staple. It's also worth considering this Max Studio Tank. This piece is extremely popular and, just as importantly, not too pricey. And do check out this Ming Wang Tank! It's a very popular item and good value for money.
If you're on a hunt for a luxury item, we recommend taking a look at this St. John Tank - a great luxury choice.