I would like to warn people who use this particular bladder for fuel storage. I am not trying to stir up a hornets here but I feel as a fellow stove builder I have a duty to make known some information about this collapsible fuel bottle. Information that I believe hasn't been discovered or known by Zelph. I am doing this for the safety of it's users and I am sure that Zelph would not have offered this flask had he known about it.
FYI: I had thought about using this style of bladder for alcohol fuel a little while ago and had contacted several manufacturers. I inquired with each of the manufacturers about the possibility of using their products for long term storage of alcohol fuel like denatured and methyl alcohol(HEET).
The reply I received from the company that makes "The Disposable Flask" is as follows:
"Dear Mr. Ballowe,
Thank you for your interest in the Disposable Flask. We currently manufacture the flasks to hold grain alcohol. While the grade/thickness/quality of the material we use can hold grain alcohol for long periods of time with no leaching, we do not sell the flasks as a 'long
term storage' device.
We would have to test and create a specific 'flask' suitable for long term storage of alcohol fuel before I would feel comfortable making any claims.
301 Central Ave Ste 218
Hilton Head Is, SC 29926"
Hope this information saves a bunch of problems down the road.
White Box Stoves