Burlington Packaging has been my supplier of hazardous material packaging for the past 7 years. Their staff is exceptionally knowledgeable about the products they sell and regulatory requirements, especially Special Provision packaging, UN Certified package testing procedures and solutions for hard to ship materials. Their pricing is always below what I have been able to find elsewhere when all the details are known (i.e. some vendors price may sound better but are not in the end). Shipping is usually next day by reasonably priced carriers. Customer service is always available with the right answers. Thumbs up 100% of the time.