11. Commitments and Contingencies Operating Leases We lease office space, warehouse space and vehicles under various lease arrangements. Total rental expense was $3,315, $3,399 and $1,574 for 2018, 2017 and 2016, respectively. At December 31, 2018, future minimum rental commitments under non-cancelable operating leases were as follows: 2019 $ 1,545 2020 962 2021 379 2022 285 2023 66 Thereafter  Total $ 3,237 Omnifrio Single-Serve Beverage Business We previously accrued deferred purchase price payments totaling $1,901 on the consolidated balance sheets as of December 31, 2016 related to the April 11, 2011 acquisition of certain intellectual property and other assets from the seller, Omnifrio. On March 31, 2017, we entered into a settlement and release agreement with Omnifrio in which we agreed to a cash payment of $710 to Omnifrio and to transfer all intellectual property and other assets purchased from Omnifrio in April 2011 back to Omnifrio. The settlement resulted in a gain of $1,191, reported within special items on the consolidated statement of operations for the year ended December 31, 2017. Prism Arbitration On August 5, 2014, Primo Distribution, LLC (also known as Prism Distribution) initiated an arbitration proceeding against us, claiming less than $1,000 in damages for alleged breach of contract. The arbitration was filed with the American Arbitration Association (the AAA), and was amended on December 19, 2014 to include additional claims for conversion, unfair and deceptive trade practices, fraud, and unjust enrichment. On July 24, 2017, we entered into a settlement and mutual release agreement with Prism Distribution pursuant to which we agreed to make a payment to Prism of $825 which was paid during the fourth quarter of 2017. The settlement resulted in expense of $825, reported within special items on the consolidated statement of operations for the year ended December 31, 2017. Texas Regional Operator Litigation/Arbitration On August 8, 2014, a lawsuit was commenced against us by our regional operators Artesia Springs, LLC, HOD Enterprises, L.P., and BBB Water, Inc. (the ROs) in the State of Texas. DS Services of America, Inc. was also named as a defendant in the lawsuit. The claims alleged against us in the lawsuit were breach of contract, conspiracy and fraud, and the ROs sought unspecified monetary damages as well as injunctive relief. On April 10, 2015, the ROs initiated an arbitration proceeding with the AAA. We resolved the claims asserted by BBB Water, Inc. as of December 31, 2015, and BBB Water, Inc. is no longer a party to the arbitration proceedings. We entered into a settlement and mutual release agreement with Artesia Springs, LLC and HOD Enterprises, L.P. on April 5, 2017, pursuant to which we agreed to make payments including interest in April, July and September 2017 totaling $3,783. The settlement resulted in other expense of $3,701, reported within special items on the consolidated statement of operations for the year ended December 31, 2017. The settlement also resulted in interest expense of $82 for the year ended December 31, 2017. Sales Tax We routinely purchase equipment for use in operations from various vendors. These purchases are subject to sales tax depending on the equipment type and local sales tax regulations; however, we believe certain vendors have not assessed the appropriate sales tax. For purchases that are subject to sales tax in which we believe the vendor did not assess the appropriate amount, we accrue an estimate of the sales tax liability we ultimately expect to pay. Other Contingencies From time to time, we are involved in various claims and legal actions that arise in the normal course of business. Management believes that the outcome of such claims and legal actions will not have a significant adverse effect on our financial position, results of operations or cash flows.