B&H Photo Video offers the TP-Link WiFi Smart Plug 2-Pack for $33.95. Clip the 32% off coupon on the product page to cut that to $22.95. With free shipping, that's tied with our mention from a month ago and the lowest price we could find now by $11. These plugs can be controlled via smartphone and voice control via the Amazon Echo.
June brings some big deals and sales, but you're better off postponing certain purchases.