These are decent; they work properly. Not significant or impressive but definitely will do the job. I am using them for my plaster teeth. They are large enough to wrap them in paper towels to protect them. I purchased the 2 pack because I wasn’t sure if the top and bottom would fit in one box. They both ended up fitting in one box. The dentist gave me a tiny retainer one that only fit my whitening trays or one of the plaster casts.