Greenmade 17 gallon (64.352 liters) storage bins are made of heavy-duty, reinforced plastic that can withstand heavy use. They include a clear base and provide a convenient and practical option for everyday storage needs. Each bin has cutouts that can be used to lock the lid to the base with a padlock or zip ties for additional security. The lids for the storage bins are recessed for easy stacking. The stack-able design helps conserve storage space.