Winter Cycling - Frozen camelbak tube

Not precisely a cycling issue, but my uninsulated Camelbak tube will freeze if it's cold enough and I don't keep the water flowing. Camelbak sells replacement tubes with a neoprene insulator but the new tube doesn't work with my old bladder. I know they sell an adapter but seems like a scam to make me buy more.

Any idea where I might just be able to buy a neoprene sheath to slip over the drinking tube? REI and Performance were no help.

Something like this http://www.alibaba.com/product-gs/284222524/Insulated_Tube_Tube_Cover.html but I don't want to order 1,000.

I only use my camelbak for mountain biking and not road riding, but after I take a few sips of water I blow into the tube to rid it of water (well, mostly). The mouthpiece will still get a thin later of ice that's broken the instant I bite it, but the water has yet to freeze.

EDIT: I know this isn't what you were asking, but you might be able to save money if this works for you. Colorado I'm sure has colder winters than here so YMMV.

I only use my camelbak for mountain biking and not road riding, but after I take a few sips of water I blow into the tube to rid it of water (well, mostly). The mouthpiece will still get a thin later of ice that's broken the instant I bite it, but the water has yet to freeze.

EDIT: I know this isn't what you were asking, but you might be able to save money if this works for you. Colorado I'm sure has colder winters than here so YMMV.

This is what I do as well. You can just go get some neoprene and make yourself one if you know how to sew, it would be very easy. You could also find a seamstress and I am sure she would do it very cheap since it would take her a whole 10 mins to do.

http://lizardskins.com/store/products/mountain/accessories/tube-insulator
This is what I have and blowing the water back makes all the difference, even with the insulator!

my water bottles used to freeze on my 50 minute commute. I used to add a tiny dash of salt & vodka and I also microwaved the water in a glass before adding to the plastic bike bottle. I got the formula just right so I didn't get drunk, didn't taste salt and had drinkable water right to the very end even in 17 degrees, albeit getting slushy by time the 50 - 60 minutes was up.

http://lizardskins.com/store/products/mountain/accessories/tube-insulator
This is what I have and blowing the water back makes all the difference, even with the insulator!

Ewww backwash :D.

I used to use a camelback for skiing in the winter. I just hold the tube/mouthpiece over my head, open, and the water just flows back into the pack.

Not precisely a cycling issue, but my uninsulated Camelbak tube will freeze if it's cold enough and I don't keep the water flowing. Camelbak sells replacement tubes with a neoprene insulator but the new tube doesn't work with my old bladder. I know they sell an adapter but seems like a scam to make me buy more.

Any idea where I might just be able to buy a neoprene sheath to slip over the drinking tube? REI and Performance were no help.

Something like this http://www.alibaba.com/product-gs/284222524/Insulated_Tube_Tube_Cover.html but I don't want to order 1,000.
I have several models of Camelbaks of various ages and the tubes are swappable between them. Been a while since I had a close look - when did they change the design?

How about knit a tube out of some sock wool? It'll have a neat pattern.