Lowest cost spill containment pallet also provides flexibility for storage and shipping. Save an average of 60% on shipping! The Ultra-Spill Pallets Flexible Model provide effective spill containment for 55-gallon drums just as spill pallets have done for years past. But now there's the added ability to break the unit down into a much smaller and compact package for more economical shipping and space-saving storage. Economical spill containment for 55-gallon drums.