It would be easier to point you in the right direction if you could share how and where you plan to use this pouch.
I use a small runner's pouch to hold my bolus insulin and test kit. I have no need to carry my Tresiba in this as it's a once-a-day insulin.
When I travel, I use a Tumi Alpha 2 Split Dopp kit.
I have two Eli Lily zippered pouches that came with my Novopen Echo and will also hold my Tresiba. However, I'm not a big fan of carrying things around that look like medical pouches/bags.