Double wall with interior spiral coil for efficient cooling. As vapors rise, they are condensed on the jacket inner wall and the outer surface of the coil. Top and bottom joints are the same size.
100% Satisfaction Guarantee: At Mansion Labs, we want to be sure that the item you choose is the right one for you. Within 30 days of delivery of your order, you may return any merchandise purchased from Mansion Labs in its original condition with your email order confirmation or packing slip. Restocking fees may apply. On items over $275 shipping within the US, we will even arrange free pick up or pay for returns shipping.