Easy to do, you can easily make a DIY for yourself as a DIY gift. This DIY bathtub bomb is a very cool /Christmas/birthday gift idea! The mold is also a Christmas ball used to fill Christmas decorations. Colour:transparent Material:plastic Package Contents: 20 x packaging box Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.