Larva Valheim 1.0.20
Larva is a crafting material that stacks to 20 in Valheim.
Larva is a Material in Valheim 1.0.17. It is a basic item type, not a weapon, armor or food, so it has no damage, armor or food values. Each Larva weighs 1, and a single stack holds at most 20. Larva can be teleported, so you can carry it with you when you teleport.
Other material items
Acorns, 
Amber, 
Amber Pearl, 
Ancient Bark, 
Ancient Coin, 
Ancient Metal, 
Ashlands Gourmet Bowl, 
Ashwood, 
Asksvin Bladder, 
Asksvin Hide, 
Asksvin Neck, 
Asksvin Pelvis.