Instructables
Picture of Making A Microwave Heat Bag
Perfect for aching joints or warmth on a cold day, and really easy to make!

Step 1: Materials

Picture of Materials
You're going to need:
Thread (I'm using gutermann sew all)
Filling (Rice/Wheat/Feed corn/Buckwheat hulls/Barley/Oatmeal/Beans/Flax seed/Cherry pits)
Two pieces of a 100% cotton material roughly 14cm wide and 50cm long.

Optional:
Essential oil (I've used lemon scent)

Because this project will be going in the microwave, a material that won't melt in heat is essential. For that reason I've specified 100% cotton. My favourite is flannel/flannelette/winceyette as this has a soft and slightly cosy texture while still being cotton.

"Fat eighths" are particularly good for this sort of project, especially when you have a lot of them in your stash.

Step 2: Filling Preparation (optional)

Picture of Filling Preparation (optional)
About a week prior to your project you should prepare your filling if you wish to add a scent.

I did, and so I put the rice I'll be using into a sealable bag and then added several drops of essential oil to it to my own tastes for how strong a scent I would like. It will dissipate some once it has been put into the heatable bag, so keep this in mind when adding the oil.

Seal the bag and leave to marinate for as long as possible before use. I usually go for some time between 4 days and 3 weeks depending on how organised I am.

Step 3: Pinning

Picture of Pinning
Line up your two pieces of fabric with the right sides facing each other and pin in place round edges.

If you're a bit scatterbrained you may find it useful to mark with a pencil or disappearing marker a gap of about 4cm that you'll be leaving open when you sew.

Step 4: Sewing

Picture of Sewing
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Sew around all 4 edges, leaving a gap of about 4cm in one of the short edges for turning and filling.

Depending on how confident you are in your skill, aim for a seam from between 0.5cm and 1cm. I usually use a 1cm seam, but go as low as 0.5cm when my fabric is less wide than usual.
 
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pvanschoiack5 months ago

Made one a bit differently. Used muslin for the inner bag and made an outer bag out of flannel and sewed velcro for a quick way to be able to wash the liner.

good call on the muslin! Does it heat well? I don't like the idea of using plastic.

wazzup1059 months ago

Hmmm.. I already got a store bought bag, but I sure could prettify it with a fleece lining ... Thanks !

bdickson19 months ago

So cute, I LOVE owls! I have been meaning to make a heat bag for some time but haven't gotten around to it. You have inspired me to make finally make one!! :)

HollyMann9 months ago

Great job - love these things :) Have a few at home and can't survive without them in the winter.