If you're on a thrifty mission, your best bet is this City Chic Tank. It's a popular piece, while not very expensive. You might also be interested in this Free People Tank. It's a product you'll love which also doesn't cost too much. You may also want to look at this Hinge Tank. This item is not expensive either, but it will make a difference in your wardrobe.
If you're after a bargain, take a look at this Ella Moss Tank. While the price is very reasonable, this item is an easy wardrobe update. It's also worth taking a look at this Misook Tank. This piece is ultra popular and, just as importantly, not very expensive. And do check out this Tank! It's a very popular item and good value for money.
If you want to splurge on a luxury piece, then what you're looking for is this Jacquemus Tank. It's more expensive but worth your money. While you're at it, also have a look at this Prada Tank. Yes, this item is expensive, but it does not mean it's not worth it. You might also want to consider this Protagonist Tank. You won't regret the money spent!