If you meant "in" ear then I can heartily recommend Shure. If the caps fit your ears properly they block out nearly all other noises, despite not actually being noise-cancelling.
Try these ones -...
Does anyone do this and, if they do, does it make a difference to the taste if you eat different things beforehand? I assume it does but I wouldn't describe myself as a connoisseur - I struggle identifying anything other than Harvey's in someone else's 'morning after' farts.
http://www.thetileapp.com/
While I accept that these might be useful if you're simply forgetful, surely the ability to just remove this device from whatever's just been stolen from you renders it a bit pointless, doesn't it?
Bike, guitar, camera - all protected. Levering the highly-visible...