I just decided to do a large order every few years to update the kits. There are plenty of online stores that stuck a good item for a good price. Although the painkillers are from the supermarket.

No-expiration dates don't mean it stays well. Have things that were elastic, but weren't anymore. Sterile packaging that just fell apart. Glue that no longer stuck. etc.

Also, some things have expiration dates, but the date is relevant for unopened packages. That and to prevent cross-contamination, kind of made me use single-use packages.