Klean Kanteen Reflect Single Wall Stainless Steel Plastic Free Water Bottle with Stainless Steel and Bamboo Cap No Paint, No Plastic Food Grade 18/8 Stainless Steel, Food Grade Silicone, Sustainably Harvested Bamboo Construction Come with Stainless Steel Unibody Bamboo Cap Large 1.75 inch (44 millimeter) opening for easy filling and pouring; Compatible with all Klean Kanteen Classic caps Backed by the Klean Kanteen Strong as Steel Guarantee