Walmart offers the Danskin Now Women's Active Mesh Tank with Bra in five colors (Acid Yellow pictured) for $3. Opt for in-store pickup to avoid the $5.97 shipping charge. That's tied with our mention from three weeks ago, $7 off, and the lowest price we could find. It's available in sizes XS to L, although not in all color/size combinations.
Of note, the Danskin Now Women's Active Mesh Detail Tank with Bra is available in nine colors for the same price.
The planet will thank you, your local (overwhelmed) landfill will thank you. Even your budget will thank you.