HDPE & PET Packaging by Parkway Plastics. Browse & Buy Wholesale from HDPE Pails (Buckets) and HDPE Jars. Parkway also offers PET Jars, PET Plaza Jars, PET Boston Round Bottles, PET Cosmo Round Bottles, PET Cylinder Bottles, PET Metric Oblong Bottles, PET Modern Round Bottles and PET Round Packer Bottles. As always, we recommend testing for compatibility with your product.