PET Cosmo Round Plastic Containers PET Cosmo Round Containers from a 4 oz. size to a 16 oz. size. Looks like glass but performs like plastic. Four colors are available - Clear, Blue, Green and Amber. All Items Here are all the products in this category: 4 oz. PET Cosmo Round Plastic Container -- 4 oz. 24-410 PET Cosmo Round Plastic Container 8 oz. PET Cosmo Round Plastic Container -- 8 oz. 24-410 PET Cosmo Round Plastic Container 16 oz PET Cosmo Round Plastic Container -- 16 oz 24-410 PET Cosmo Round Plastic Container