Pllieay bath bomb mold is popular gifts for your partners, 9 set DIY Metal Bath Bomb Mold with 3 sizes 18 pieces for bath bomb, large quantity combination, very economical. It's a nice variety and perfect for making small to large sized bath bombs. 

Specifications 
Mold Material: Aluminum alloy 
Shrink Wrap Bag Material: POF
Mold Diameter : 4 cm / 1.8 inch, 5 cm / 2.2 inch, 6 cm / 2.6 inch 

Ingredients of making bath bomb 
1 cup baking soda
1/2 cup citric acid
1/2 cup epsom salts
1 tsp. water
2 tsp. essential oil or fragrance oil (avoid minty oils)
3 tsp. olive oil or similar vegetable oil
a few drops food coloring (any color)

How to use 
Step 1: Fill each half of your dome molds with the ingredients mixtures until it's just overflowing a little.  
Step 2: Press the two sides together and use a lot of pressure to compact the mixture firmly into the molds, to prevent cracking.  
Step 3: Whisk away the excess mixtures around the molds. 
Step 4: Use a wooden spoon to tap slightly around the molds. 
Step 5: Gently remove one side of the mold, then gently invert the bath bomb so the uncovered side is facing down, then gently remove the other half of the mold from the top.  

NOTE: Don’t hit the molds with metal spoon. 
Not suitable for use in a dishwasher.

Package include 
3 set x 4 cm Bath Bomb Molds
3 set x 5 cm Bath Bomb Molds  
3 set x 6 cm Bath Bomb Molds 
30 x Shrink Wrap Bags