Costco offers the PUMA Women's Seamless Sports Bra 2-Pack in Pink for $9.99 with free shipping. (Non-members pay a $0.75 surcharge.) That's $5 under our March mention and the lowest price we could find by $10. It's available in sizes S and M.

Note that both sizes are currently backordered. It's expected to be back in-stock by July 13.