I love, love, love GLASS CANNING JARS and find they work so well in my pantry. I've purchased them all at thrift stores so I didn't spend a lot of money switching from plastic containers to glass jars.
My all-time favorite size is the 1/2 gallon canning jar. I can fit 2 deep in my upper cabinets so they don't waste any space. I store flour, sugar, rice, pasta, bread crumbs and oatmeal in this size jar.
Quart canning jars are the perfect size for chocolate chips, dried fruit, nuts, dried coconut, dry milk etc.
Half pint canning jars are the perfect size for cocoa, baking soda, wheat gluten, salt, etc.
Quilted Jelly jars are the perfect size for spices and it's an added bonus that they come with decorative labels.