One of the smaller additions coming in Dragonflight is Reagent Bags, a new bag type that specifically holds Profession reagents. In Phase 2 of the Dragonflight Pre-Patch event, players are able to get a headstart on their reagent bag slot with the Storm-Battered Reagent Bag, a 20-slot reagent bag!
The Storm-Battered Reagent Bag is the only reagent bag players are able to obtain until Dragonflight.