Are they still used or is there a modern improvement? I like the fact that it comes with the stainless steel cup for cooking. Edited to add this: [ame="http://www.amazon.com/Guyot-Designs-Stainless-Steel-Bottle/dp/B001O7GPAC"]Amazon.com: Guyot Designs Stainless Steel Water Bottle - The Backpacker: Sports & Outdoors@@AMEPARAM@@http://ecx.images-amazon.com/images/I/21JSKofx-rL.@@AMEPARAM@@21JSKofx-rL[/ame] It's a bottle that you can boil water in directly if necessary. Good reviews.