SoooCool via Amazon offers its SoooCooler 25-watt Edison Filament Bulbs 6-Pack for $18.95. Coupon code "NRKKMBB9" cuts it to $11.94. With free shipping for Prime members, that's tied with last month's mention and $5 under the lowest price we could find for similar bulbs. Deal ends May 31.

Note: They're also available in 60 watts for $11.94 via the above coupon, with free Prime shipping.