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Best material for pot/ziplock bag cozy?
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Alasdair Fowler
(MessiahKhan) - F

Locale: Newcastle, UK
Best material for pot/ziplock bag cozy? on 10/16/2011 03:55:24 MDT Print View

I need to make a pair of zip lock bag cozies (unless anyone knows of good commercial ones out there?). What is the best material to use? Obviously it needs to be light, durable but most importantly have high insulation properties. Any suggestions?

Doug Coe
(sierraDoug) - F

Locale: Bay Area, CA, USA
Cozy materials on 10/16/2011 08:35:36 MDT Print View

I made one out of Reflectix from the hardware store. Foiled bubble wrap. I also bought one from (Sarah's joint). Fleece with velcro closure and cool colored patterns! The Reflectix is lighter, the fleece is easily washable. Take your pick.

Edited by sierraDoug on 10/21/2011 09:19:03 MDT.

Chris Lucas
(ChemE) - F

Locale: SC
Insul-Bright on 10/16/2011 12:16:06 MDT Print View

I know that this was the fabric of choice once upon a time thought I believe Sarah has found something else that she prefers.


Joe L
(heyyou) - MLife

Locale: Cutting brush off of the Arizona Tr
function on 10/16/2011 22:37:07 MDT Print View

Consider the temperatures when and where you will be using your cozy.

I used reflectrix in a cylinder shape (padded my Heineken pot) and it worked so well that I often burned my lips and I always had to wait for the food to cool before I could eat it. Yes, the material and shape were too efficient for my circumstances.

Mailing envelopes with bubble insulation are adequate for me. They are cheap, come in different thicknesses for different sizes, easy to cut, and serve a second use as insulation under my head.

Mary D
(hikinggranny) - MLife
Best material for pot/ziplock bag cozy? on 10/16/2011 23:57:18 MDT Print View

Sarah had some "UL" cozies she made several batches out of. The outside surface is metallic. Unfortunately, she was not able to get more material. I bought four of them. I really like them; they really hold the heat, and are lighter than her standard cozies!

Mark Fowler
(KramRelwof) - MLife

Locale: Namadgi
Local supply on 10/17/2011 01:01:16 MDT Print View

Being in the UK you may find the products mentioned are not available - this is the case in Australia (or at least I haven't stumbled across them). Just use a windscreen shade which is made of reflectix (or something very similar) from your nearest auto accessory shop.

Bryce F.
(bster13) - MLife

Locale: Norwalk, CT
none on 10/17/2011 05:32:13 MDT Print View

Might u consider saving the weight and just putting the freezer bag under the insulating layer you're already wearing in camp?

patrick agius
(Streamline) - F
If you are interested in DIY on 10/17/2011 08:08:06 MDT Print View

Go the car visor route. I bought a $5 truck visor and made two bot cozies and have half the visor left. I just left my food in the pot. Also for finishing the edges and taping it all together go to your local hardware store and pick up the tape that is used for duct work. It is a metal tape and super adhesive. Worked great!

Michael Duke
(mpd1690) - F
Re: Best material for pot/ziplock bag cozy? on 10/17/2011 08:18:01 MDT Print View

Some one here suggested this a while back and I like it. Just use an old mountain house bag. I just put everything I'm reheating into a freezer bag then use a mountain house to store the freezer bag in while it rehydrates.

Sarah Kirkconnell
(sarbar) - F

Locale: In the shadow of Mt. Rainier
Re: Insul-Bright on 10/17/2011 08:41:30 MDT Print View

Yes, I still use Insul Bright. I love that fabric! It is made in the US I might add. And yes, I still make cozies you all! Sadly the really cool metallic silver ones were a very limited run (wahhhhhh, I loved those!)

Colin Parkinson

Locale: Ontario Canada
pot cozy on 10/17/2011 16:38:20 MDT Print View

The absolute best pot cozy is made out of an EVA foam pad.

This can be used as a pot cozy plus it is stiff enough to hold the freezer bag alone, so freeing up the pot to hold delicious hot chocolate.

see link, scroll to bottom of the PDF to see a picture of the pot cozy.

Mine is blue.

Sarah Kirkconnell
(sarbar) - F

Locale: In the shadow of Mt. Rainier
Re: pot cozy on 10/17/2011 16:47:07 MDT Print View

The one thing to remember about any cozy be it for pot or bag is that flexibility is as important as durability - and even weight. If it doesn't get small you have a packing issue.

This was why I never made our FBC Cozies out of Reflectix or similar. It doesn't get small, you can't clean it easily (it gets a stink). It is bulky to put it bluntly.

Anyhow, that was how we went the fabric route. Washable and packable and as a bonus very light ;-)

Scott Littlefield
(sclittlefield) - F

Locale: Northern Woods of Maine
reflective material on 10/18/2011 09:35:03 MDT Print View

Hey Sarah - I tried to PM first, but it wasn't available. Is this something like the reflective material for cozies?
Reflective Ripstop

I've been using that material for cozies for my personal use and it works amazingly well. I've been using Climashield and Insultex with it, but I bet Insulbrite would work fantastic! I may try that.

Full Disclosure: I run that store - DIY Gear Supply, so I was hesitant to post - I don't want to come across as a salesman to my fellow DIY gear builders. It's just something I found in a very limited batch and has worked very well for my own projects.

Sarah Kirkconnell
(sarbar) - F

Locale: In the shadow of Mt. Rainier
Re: reflective material on 10/18/2011 11:28:43 MDT Print View

Yes...the stuff I had was discontinued (I had gotten lucky and bought up all that Seattle Fabrics had at the time). It was the very thin silnylon, on both sides. Fab stuff, it increased the temp ratings on our cozies by 5-15* on average. Lovely stuff and very UL. Ahhhh....miss it!

Anyhow, Scott, you'd love Insulbright. I buy it on the rolls. It is easy to sew and handle but wow does it shed - and dull rotary blades as a fair warning. I cut outside and wipe up with a wet cloth to keep it away from my kids and cat. You pair that material (the nylon) with IB and you have a winning combo! BTW, IB is a mylar inner with flocking on both sides.

Michael Davis
(mad777) - F

Locale: South Florida
Re: reflective material on 10/18/2011 11:48:38 MDT Print View

I bought the reflective fabric from Scott (above) and used two layers, with shiny side facing inward, and between the reflective layers, I added a layer of Insultex (also from Scott). This has worked out well because it is flexible, packable, washable and still weighs only 1/2 ounce.

Kevin Beeden
(captain_paranoia) - F

Locale: UK
re: Best material for pot/ziplock bag cozy? on 10/18/2011 12:05:23 MDT Print View

Reflectix equivalent in the UK is Thermawrap, available in big rolls from B&Q. BobC at used to sell smaller pieces of this.

Alternatives: closed-cell foam 'camping mat' from the 99p Store.

Of just re-use bubble-wrap Jiffy Bags, or, even better, Jiffy Foam bags or sheet; the microbubbles in Jiffy Foam (EPE foam) provide better insulation, since they don't allow air circulation within a big bubble, unlike bubble wrap.

Edited by captain_paranoia on 10/18/2011 12:16:58 MDT.

John Rossing
(PapaJohn) - F
Re: reflective material on 10/29/2011 14:42:37 MDT Print View

Is this reflective coated nylon washable? I'm wondering what the reflective coating is and how it's applied to the fabric.

Colin Krusor
(ckrusor) - M

Locale: Northwest US
Reflective 30d Nylon on 10/29/2011 15:40:47 MDT Print View

Scott, I just visited your site for the first time, and I'm very impressed. Several items that I have had a little trouble finding elsewhere for my DIY gear projects are available on your site at reasonable prices.

Do you know the weight of the reflective 30d fabric?