It was made by combining a gold charm with 1 spirit shards and a Proboscis. This required 17 Summoning and gave no experience. The unfinished pouch could then be infused at a summoning obelisk to make the Spirit mosquito pouch, giving 46.5 Summoning experience. Any leftover uncharged pouches may still be converted in experience. Clicking one in your inventory prompts a warning message saying: "this item no longer has use. Convert it and claim the xp contained within?". Choosing 'Yes' will convert all pouches in your inventory into 46.5 summoning experience each.