There’s a built-in speaker that performs a sound, or you have to use Apple’s “precision” mode to see precisely the place your lost merchandise is. No-one wants their tea to go cold, and this sensible mug is the reply to those cooling issues. This 295 ml mug comes with a chargeable coaster that keeps drinks scorching for as much as 80 minutes on a cost – and lets you select an actual temperature via Gadget a phone app. Off the rechargeable coaster, the mug…