I took this camping once. I put a Sierra cup inside. It's in good condition, but it smells like a campfire. Please purchase only if you understand this. A Tyvek insulated bag with a strong presence. The lining is sewn with a heat-insulating sheet. It's sized to fit a 500ml plastic bottle, but it can also hold a mess tin or Sierra cup. Also, it's the perfect size to store 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 the more you use it, so it's a bag that's fun to use. This is a simple insulated bag, so it does not have a refrigeration function. Also, because the insulation material and Tyvek are sewn together, the shape and size accuracy vary from one bag to another. Izu no Nushi Tsuri mountain mountain factory 38explora busedebrunt asimocrafts Asimocrafts Asimocrafts ballistics TARPtoTARP Ballistics sanzokumountain somabito deviseworks Device Works HALF TRACK PRODUCTS HALF TRACK PRODUCTS neru design works Natal Design Old Mountain Kermit Chair Snow Peak Helinox yeti thearth oldmountain Sanzoku Mountain noras nerudesignworks neru design works asimocraft Kermit Chair garakuda bonfire go outside TARP TO TARP GRINDLODGE