Where is everyone buying these from. I am going to start making my own

mixes and I want use these to keep the bugs out but I am new to this.

I am going to use jars that I have saved from pickles, etc. I have all

size jars from small to large. I just googled these and found that they

come in 300cc and 500cc.

Which ones do I need and how exactly do I use them. Do I just add one

to the jar and then hand tighten the lid. Also, once I open the jar to

take out some of my mix, is the packet still good or do I need to

replace it each time I open the jar?

Thanks, Tammy who is just learning.