The Wild case and refill are designed to go together, but you're welcome to use the product(s) as you wish!
You can refill your Wild case with a Wild refill, you can buy a Wild case and fill it with another liquid soap, you can buy the refills and just them with another pump, or just on their own... it's really up to you! Some of the variations might be a bit messier or less efficient then the Wild case and refill combo and, naturally, our recommendation would be to use them together as our design team intended.✏️