Bull ant

The Bull ant is a level 40 Summoning familiar. It is summoned by using a Bull ant pouch, which will give you 0.6 Summoning experience. Apart from being able to hold up to 9 items for you temporarily. It also has a special move called Unburden that restores running energy based on one's Agility level, which can be activated if you have a Unburden scroll in your inventory. The Bull ant is immune to poison damage.

It originally could only hold 3 items but this was increased to 9 with the Summoning 2 update.

Components: 1 empty pouch, 11 spirit shards, 1 gold charm, and 1 bunch of marigolds.