I've heard of so many people putting them in the fridge to keep them longer. With my own trial and error, every meal worm that I put in the fridge, died. My mom works at a pet store/pet pharmacy. They use mw for the store animals, as well as selling them. Every time they've put any in the fridge, every worm has died. I've stopped putting mine in there as well as my moms work, and we haven't had any die, besides being eaten of course. So with the fridge idea, I really don't trust in it. I just don't want your whole shipment to die and then have less food for your frogs. Good luck with that. We haven't had any success rate with the mealworms and the fridge. I'm against it. But I do wish you the best of luck!