Specifications: Material: Aluminum Color: Silver Size: S:4.5cm X 2cm; M:5.6cm X 2.6cm; L:6.7cm X 3cm How to make bath bomb: 1.Gather your supplies. - Dry ingredients: 8 oz. Baking soda, 4 oz.Citric acid, 4 oz. Corn starch, 4 oz. Epsom salts - Liquid:1 tsp Plant oil, ? tsp. Water, 2 tsp. Essential oil, Food coloring - Tools: Bath bomb molds, Whisk, Spoon, Bowl,Cup 2. Combine dry ingredients. - Dump all of dry ingredients into the bowl. - Stir them all evenly with whisk. 3. Combine the liquid. - Place all of liquid into a cup and stir until well mixed. - Note: Be careful, too much water will ruin your bath bomb! 4. Mix liquid and dry ingredients together. - Slowly add small amounts of the liquid to dry ingredients while whisking. - Repeat this step until all the liquid emptied. - The mixture should begin to clump together when you squish it. 5. Pack mixture into molds. - Grab your mold and pack tightly the mixture into the first half of the mold. - Then do the same with the second half. 6. Press the two sides together. - Squeeze the molds together to create your sphere. - You can add some rose petals or lavenders on top of the second half. 7.Compact the mixture into mold. - Press firmly to prevent bath bomb cracking. - Remove any excess mixture around the mold. - Note: Be careful, rotate the mold will not help to remove the bath bomb! 8.Tap slightly around the mold. - Use a spoon to tap slightly around the molds. 9. Gently remove the bath bomb. - Carefully remove the bath bomb from the mold. 10. Let bath bomb dry. - Place them on wax paper on top of a fluffy towel. - Let the bath bombs dry for at least one day before you use them. Package include: 20pcs Half Ball Molds