Seed storage vials

[happydog]

I spent all day yesterday sowing flats using Craig's fantastic dense planting method. I kept thinking of his sleek, streamlined process while I painstakingly opened and closed my hundreds of motley paper and plastic envelopes of various sizes and shapes.

I now know these things -
1. I hate the little plastic zip top bags
2. paper envelopes are fiddly and can't be sealed and unsealed multiple times
3. it's time to upgrade

So, now I'm seriously wanting to get some vials for seed storage. They seem very efficient, easy to handle, and easy to get seeds in & out of. I have a couple of questions for Craig or anybody else who uses these.
1. Does the 7 dram size work for all your seeds or do you use various sizes for different kinds of seeds? (Obviously not corn and beans. )
2. What do you store the vials in?
3. Are you happy with them or wish you had something different?

I'd be grateful to hear any thoughts you'd care to share about using them.

Thanks!