If you'd rather not spend much, this Carhartt Tank will fit the bill. It's a fail-safe choice, while not very costly. In this price range, you can also take a look at this Tank. It's also a popular item and won't break the bank. You might also want to consider this Eileen Fisher Tank. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
For something in the middle of the price range, look no further than this Ming Wang Tank. This item doesn't cost the earth, but absolutely deserves a spot in your wardrobe. It's also worth looking at this Ralph Lauren Tank. This product is extremely popular and, just as importantly, not too pricey. And do check out this Nic+Zoe Tank! It's a very popular item and good value for money.
If you're willing to splurge, then what you're looking for is this Raquel Allegra Tank. It's more expensive but worth your money. While you're at it, also have a look at this Ralph Lauren Tank. Yes, this item is expensive, but it does not mean it's not worth it. And one more item you might be interested in is this Armani Collezioni Tank. 'Cause you deserve nothing but all the finer things!