Can be filled with 10 units of water at a Well or 10 units of Compost at a Compost Box.
You're left with an empty Bottle after you finish (or sell) all the Compost inside a Bottle of Basic Compost or the Crop Dust inside a Bottle of Basic Crop Dust.
You can purchase an empty Bottle from the Shop (Storage section) or the Top Containers Shopkeeper in Eldevin City for 25 bronze.