I have been
The reason that this project jumped to the top of the list is because:
A - It is quick.
B - I need it.
I am VERY familiar with being everyone's camel during the hiking/biking/festival months, and when I saw this simple solution I was like, "Hell, yes! So smart!"
Unfortunately, I don't stock any insulated batting and I would have to travel a few hours to get some. So, I started hunting around my house for an alternative. My husband actually came up with the idea of using one of his neoprene-like Under Armour shirts. I was like, "Cut up clothes? Totally!" I know that the shirt isn't the same when it comes to retaining the cold temperature of the water bottle, but I don't care about that. Water is hydrating whether it is cold or warm. I just needed something that would keep the condensation from making the carrier a soggy mess, and this should work fine for that.
I am "sew grateful" to all of the creative, brilliant, inspiring, dedicated bloggers out there that post free tutorials. I know how much work can go in to drafting patterns or instructions, and I love the feeling of community I get when people share their efforts with the rest of the world. It makes the internet seem a little cozier. ;)