Description:The Allegra features double wall. vacuum insulation to keep drinks hot for up to 6 hours or cold for up to 12. Plus, this bottle will fit in most car cup holders. We are encouraging everyone to switch their single-use plastic water bottle to our beautiful reusable Allegra Bottles. That's why we are donating 50 cents of each bottle sold to Sea Shepherd, to aid them in their mission to reduce single-use plastics, clean up our oceans and protect marine life. Product Specifications: Double wall, vacuum insulated. 304 stainless steel inside, and 201 stainless steel outside BPA Free Keywords: metal