Are there any nice-looking bags/pouches made for the express purpose of holding multiple whistles (in their own cases or not)
I use an architects’/draftpersons’ case. It can fit quite a few whisltes, low and high, in them! I’m not good at the copy paste stuff but you could google them.
I’m not aware of any such thing made specifically for whistles, but I have heard of drumstick bags being used to hold large amounts of whistles.
Goldie multiple-whistle softcase:
http://www.colingoldie.de/accessories.html
Took me a while to get one because postage was looking prohibitive till Brigitte discovered she could slash that by folding it to half its length, but it’s made for the job and does it well, especially for those of us wanting to carry a full range of low to high whistles.
Folkcraft Instruments makes a nice case specifically designed for tinwhistles or Native American flutes. Price is $80.00 with free shipping. Although a little on the pricey side, it will hold multiple whistles up to 23-24 inches long. You can check it out here:
https://folkcraft.com/collections/cases-bags/products/tin-whistle-native-american-flute-carrying-bag
I use a buckskin stanley sweetheart chisel roll. I can fit 12 whistles in it. Coincidentally the logo is nearly identical to ralph sweet’s logo for sweetheart whistles.
Newspaper?
Here’s an earlier post on the topic…
https://forums.chiffandfipple.com/t/whistle-quiver-update/97371/1
Best wishes.
Steve
Benhall, you’ve been watching Cathal McConnel. . . 
Bob
A lot of good options have been presented in this thread. I just might have a go at making one of those whistle quivers.
You might also consider whistle rolls, like mine previously discussed here and summed up (with links back) on my blog:
http://www.petestack.com/blog/whistle-rolls.html
Interesting to note that most of the instruments you see in my photos have been replaced and sold on, though I regard my current line-up as pretty stable.
Might also point out that the main advantage of the Goldie case over these is not needing space to lay it out flat for access, though I still find the simple towelling prototypes we made before these useful if I’m just wanting to stick a few small whistles in another case or box.
And bailing wire with 2 rags to plug the ends. Classic!
I like tool rolls (so much so that I was almost angry when a previous employer wouldn’t allow me to store my combination wrenches in their nice roll!), so I’d like a whistle roll, too. However, it would have to be commercially made, as the one sewing job I attempted was an unmitigated disaster.
Certainly not a nice-looking solution, nor even near the most practical one in means of transportation, but I simpy use the cheapest drum stick bag I found on the web.
Does the trick to the extent that is required for now.
I use Rosetti drumstick bags with snake skin pattern to hold my low whistles.
David