I’ve used the CVS ice packs for years. I love how flexible they are even when totally frozen. I find them to be super durable, I had a few for at least 5 years until the plastic broke. I even still have a few going strong! They also come with a great cloth holder that is well-made. However, I recently bought a few new ice packs, and I feel like they changed the formula of the blue stuff inside. I feel like it doesn’t get nearly as cold or frozen as my old ones do. It’s really weird. I have a few of the new ones, and they all don’t freeze well, so it’s not a fluke. It’s such a disappointment, and unfortunately I won’t be purchasing these anymore until they change it back to how it was.