Best Way To Ship Coins?

I don't like a padded envelopes for rolls. Use a box and maybe a priority box (free for the PO)with good padding. I like bubble wrap. HTH

I believe coins travel a little better than rolls.

I've sent rolls of coins, loose coins, etc in the USPostal's flat rate boxes all the time. Haven't hada problem in years. Used to be $7.70 but now $8.30 I think. I use the newpaper for padding. Put as much stuff in those boxes as will fit and surround them with crumbled up newspapers. Most people already have newspapers so you don't have to go out and buy anything additional for mailing. However, I do go around the edges of the box with that clear wrap tape so can not be easily opened. When they ask at the post office what is inside I tell them books for my son at school. Don't like anyone knowing what may be inside. The loose coins I've put virtually thousands of cents in plastic freezer type bags and also surrounded them with newpapers. I like that one price regardless of the weight. One time I shipped a box full of knives to someone and the lady at the post office said if that wasn't flat rate it would have cost me $75 for the wieght.