The amphibious robots that use screw-shaped pontoons to float on water

TL;DR: iBUYPOWER is offering an an extra discount on any RDY Prebuilt PC with code 12DEALS. This is part of its 12 Deals of Christmas

SAVE $16: As of Dec. 16, the Amazon Fire TV Stick HD is on sale for $18.99. That’s a 46% discount on the list price.

SAVE $40: As of Dec. 16, the Amazon Fire TV 2-Series is on sale for $109.99 at Amazon. That’s a 27% discount on the list

SAVE $40: As of Dec. 16, the Shokz OpenRun Pro 2 are on sale for $139.95 at Amazon. That’s a 22% discount on the list

TL;DR: From Dec. 16-18, Back Market is running a 72-hour flash sale on a wide range of refurbished tech. Mashable readers can enjoy limited promo