Double wall stainless steel keeps your drink and ingredients insulated,finger hole provided for easy carrying,wide mouth top allows for easy filling and ice cubes, if needed. * Cushioned base through a soft rubber base pad to prevent slippage,health-safe materials - BPA/EA-free Tritan Plastic from Eastman and 18/8 stainless steel*,extra deep ingredient cup allows for maximized flavor,easy to clean . * Create your own flavored vodka * Each Zinger is simple to clean and allows you to enjoy creating tasty new infusions. * Vodka Zings have a more robust flavor after one-three hours of steeping. Longer infusion times provide for a stronger and more noticeable flavor.