Housavvy via Amazon offers the Housavvy Stainless Steel Sippy Cup 2-Pack in several colors (Silver pictured) for $15.99. Coupon code "6MNFP57H" cuts it to $11.99. Plus, Prime members receive free shipping. That's tied with our mention from last month, $14 off list, and the lowest price we could find. These vacuum-insulated and double-walled cups come with two silicone straws and BPA-free lids. Deal ends May 18.