Neru Design Works neru no bag neru design works neru no back I am selling this as I have no use for it. I took it camping once or twice, but I hardly used it. A distinctive cooler bag made of Tyvek. The lining is sewn with a heat-insulating sheet. It's sized to fit a 500ml PET bottle, but it can also hold a mess tin or Sierra cup. Also, it's the perfect size for storing a KOVEA CUBE, so it can be used as a storage bag. As you know, Tyvek is a very strong material, and the texture improves with use, so it's a bag that's fun to use. This is a simple cooler bag, so it does not have a refrigeration function. Also, because the cooling material and Tyvek are sewn together, the shape and size accuracy vary for each one. It will be shipped in simple packaging.