If your blender cap, gasket, and blades will fit onto a standard canning jar, you have your very own Magic Bullet, coffee grinder, and baby food grinder in one. I already had drinking glasses that have handles on them that look like canning jars, and regular canning jars can be used for drinking glasses too.
I have found that the pint size canning jars were the most useful for me, like for grinding and keeping fresh ground coffee beans (ask online how many seconds to grind beans for what type of coffee you want). I have used other sizes too. I have some of the small 1/2 cup ones that works well for my grandson's homemade baby food too. I also bought a box of 12 canning lids that twist, not expensive, and not the usual two part canning jar lids, and they are great for covering anything left over put into the refrigerator.
My Oster blenders have always been able to use canning jars for me. I don't know about the other types of blenders, so just check and see if they will fit. I'm pretty sure there are others that will fit too.
Be careful with using boiling water in blending in the canning jars. I didn't have any problems with it ever, but I thought it was best to put a towel over it before blending, just in case.
By Kathryn Visser from Grand Rapids, MI
Check out these photos.
Redneck wine glass made out of candle holder and Mason jar (with E-6000 glue).