Review (5/5): Sister Spa is the best ice pack I have ever used
I tend to have headaches. I have tried several ice packs. Sister Spa is the best ice pack I have ever used. It seals well. My last ice pack from Sister Spa lasted almost 5 years until my cat poke a hole in it. Other than that, the ice pack never leaked. It also never had any molding issues. I highly recommend this brand.