R.J.
All my spices and herbs are kept in air tight / LIGHT tight containers. I've bought new on accident, and they've been the same quality as the ones I've had properly stored for years.
I buy my spices in bulk from an idian market, and then store them in various sized tins. Big ones for the general storage, and then little ones for daily use that I refill. (($2 for 5lb of pepper corns... vs $9.99 per OUNCE, $3 for a gallon sized bag of bay leaves -hundreds of leaves-, v $5 for a little jar with 10 leaves... is why I buy at Indian marts. Granted. I don't think I'll ever USE the 5lbs of tumeric I bought for $2... but better than spending $5 twice a year!)) After a mishandled move (WHERE ARE MY KITCHEN BOXES!?!?!) I had to completely reoutfit my spice cupboard. I have over 130 spices and herbs. At $5 a bottle at the grocery store... that's a SIGNIFICANT loss. But at the Indian mart $80 saw me fully outfitted. Then I just went online to a food storage site and bought 300 tins of various sizes. Most for $0.33 each, some for $1.00 and some for $0.19 each. All told Ispent abput $100. I go to home and container stores and SNICKER at the $20-$45 "spice racks" with 14 jars. I'd be BROKE if I paid those prices!
As long as they are both air and light sealed; they're great.
Those glass containers LOOK pretty, and all, but they're really not what spices and herbs should be stored in.