Each bottle is handcrafted with a zero waste approach. I take orange and lemon slices from my simmer pot kit discard (ends of the citrus or imperfect sclices) and soak them in vinegar for a minimum of 6 weeks for potency. I then strain, add lemongrass and lavender essential oils and bottle each one with care! 4 oz glass bottle is good for at least 3-4 full spray bottle refills depending on how potent you like your all purpose sprays! Just add around 2 tablespoons to one clean spray bottle of your choice an fill the rest with water! Shake well before each use • Made with only 100% therapeutic grade essential oils • safe for skin but avoid contact with eyes.