Betweenlands Storage add storage blocks to the Betweenlands mod, made of differents materials, all found in The Betweenlands World
https://www.curseforge.com/minecraft/mc-mods/angry-pixel-the-betweenlands-mod
It add :
Amate paper blocks
Lurker skin blocks
Tar drip block
Tangled root blocks
Swamp reed blocks
Shimmerstone blocks
Sap spit blocks
Sap ball blocks
Angler tooth blocks
Dry bark blocks
You can use that in every modpacks you want