The water bottle fold is definitely lightweight for carrying, 7.5L capacity to store water, enough for travel or camping. The water tank could be used in the household emergent for summer water storage and also applied for outdoor picnic barbecue, for camping gear outdoor survival gear, camping, hiking and hunting.  

Food-grade PE plastic. BPA Free and non-toxic, the suitable temperature is among -20℃-80℃. Odourless and tasteless,environmental friendly material.