My wife let me buy this fife when she got a new keyboard as Christmas presents. The fife just made it in the mail today. I think this will help focus my embouchure and will make for a great instrument to leave in the car.
I had one of those once, so I know you’ll like it, congrats!
Edit: Perfect to carry around, it fits in a pocket, and virtually maintenance free!
Edit#2: The stealth factor: it looks like a toy (but it’s not) so nobody who sees it will expect much.
Just tried one but it fingers differently from our regular
flutes, doesn’t it? I didn’t want to learn new fingering.
Cool. Now I want one, but can you get a fife with just the normal 6 holes in D?
(Doesn’t want to learn new fingerings 
)
Unfortunately, IIRC that’s the only such offering from Yamaha.
http://www.thewhistleshop.com/catalog/otherinstruments/flutesfifes/renfife/ren.htm
the whistle shop has this in the key of D. i don’t know anything about fifes. i barely know about flutes and whistles.
Learning different fingerings can be done more easily if one simply doesn’t think of all flutes as being identical. For instance, I pick up two different flutes every day, one ITM and one Boehm, which finger differently, and I just think of them as being different instruments, which they are. So, please, when you pick up the Yamaha, think of it as being the flute that it is, and not an ITM flute, or anything else.
Because the Yamaha is so easily carried around, and if embouchure development is your goal, then because it could spend so much time with you, here, there and everywhere, it could well be worth learning how to finger.
Edit: This little flute can be played in temperatures colder, and hotter, than you might care to play in, and can even be played in the rain, no problem.
Looks cool, I may have to get me one of those, or the yamaha one. So many options, but sadly, no money in the bank 
On occasion sweetheart have these in different woods, I have one in purpleheart; if you contact Ralph he’ll let you know what’s available. They are made with all the care that goe
into their more expensive products and are great value.
Aulos (yes, the rr makers - who also make very decent Baroque flute copies, BTW) have long made something very similar (and slightly nicer looking), in C with fingering sort of a cross between flute and rr, from what I recall (6-finger note is D). That “reform” style embouchure (those ridges) is a darn nuisance, though. Not too bad for a child-size face/mouth conformation (I think they are sold as a kids’ thing, though they certainly work just fine as what they are), but when I tried one (Aulos) a few times many years ago, they just got in the way and messed up my embouchure. You could file them off, I suppose… I agree with comments that one can quite quickly associate different fingering arrangements with different instruments, master and compartmentalise them.
A quick Google turned these up, amongst other things:
http://www.saundersrecorders.com/fifes.htm
http://forums.abrsm.org/index.php?showtopic=19080
http://forums.abrsm.org/index.php?showtopic=18409
The model of the Aulos is the C-21
Yeah, I was thinking of the old brown-and-cream one (like the recorders) - seems that is now discontinued. I haven’t laid hands/lips on a new style one. The links I gave all say the Yamaha is a better instrument than even the new design Aulos, FWIW
Aulos, yes! I have one of their Baroque copies, made of a hard polymer like material, and it plays quite well, but as a one-key flute, I tend not to wander too far from the key of D, as too many cross-fingerings get me to thinking about the sound of distant ducks on a foggy day.
Apparently we agree on the prospect of adopting different fingering systems, thank you. It would be nice if all flutes fingered the same way, but, obviously, they don’t.
Good links! I see reference to The Fife Book, which apparently serves to accompany this particular flute. And, at the bottom of the first link, saundersrecorders, there is a link to a couple of sound clips, of what the Yamaha can do.
(But, shhh! Apparently this little flute is known to be a training tool for another, larger flute, but not a six-holed flute!) 
Completely forgot that I had one of these things - never really got to grips with it and ended up forgetting it with other things to play.
Just pulled it out and realised that it is perfect for Julia Delaney - with which I still have serious problems on my wooden flutes. (No problem on the Boehm, but I don’t take that to most of my sessions)
This little thing, because it plays a scale of C but has the same fingering for all the notes as a D flute or whistle with the exception of the F Natural is a cinch to play in c major. Try it with e.g. Julia Delaney. It even has the thumb hole like my other flutes!
Chris.
Strange, it doesn’t look or play anything like a shakuhachi or the quena. (although they all have thumb holes, so I guess I can see some similarities)
If someone wants a fife with fingering like an Irish flute, get a fife. Sweetheart has 'em. Even little ones in D (which I guess would make them more like piccolos.)
'Course you’re supposed to play them in octaves 2 and 3, but nobody’s stopping you from playing octave 1 in the privacy of your own home.
I have a Bb fife. I don’t play it much though, but it is good for embouchure. I guess my embouchure is worse because I can barely play it now.
The older Sweetheart High D was a fife, but the newer Sweetheart High D is actually a little, conical bored flute, and it rocks!
Sweetheart currently makes two D fifes.
Renaissance Fifes
A simple, straight-bore, one-piece, non tunable fife.
His Professional model
A two piece, contoured bore fife that played the upper registers better than his older D fife.
His older D fife design was similar to his folk fifes in D.
Also a two piece fife, contoured bore, and tunable by the tenon.