The seahorse stopper is what makes this one. Paired with the blue glass, it feels made for a water altar.
Fill the bottle with fresh water, set your intention and leave it where it can catch the moonlight. Afterwards, keep it on your altar and use the water in cleansing or spellwork. I’d also use this bottle for sea water collected on a trip — a way of bringing a little of that place home for future workings.
