This awesome silicone mould is Dishwasher Safe, Easy Clean and Microwaveable.
These are a decent size and great just as a gift on their own. You could carefully use these as bath bombs however you would need some experience on how to do this.
These come in white colour
Size of mould - 29cm length x 17cm wide x 5cm tall
The size of the individual moulds - 6cm wide x 4.5cm tall