If you're looking for a thrifty option, why not check out this Yummie by Heather Thomson Tank. It's a wonderful item for a good price. Another good option is this WAYF Tank. While the price is not very high, be sure that this piece will become a valuable addition to your wardrobe. You might also want to consider this Zella Tank. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you're looking for a good deal, look no further than this AG Jeans Tank. This item doesn't cost the earth, but absolutely indispensable in your wardrobe. It's also worth looking at this Tank. This item is extremely popular and, just as importantly, not very expensive. Take a look at this Eileen Fisher Tank too! Great value for your money.