my new one bag, 20L for travels up to 2 weeks. two bottle holders with extra support, can pack 1.5L x2. plus isothermal bottom section for food. Decathlon. : r/onebag
Quechua Arpenaz 20 L Backpack Black Gray Camping Hiking Day Bag | eBay
ARPENAZ 20 XC - YouTube
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Decathlon Quechua 20 L Hiking Cooler Backpack, Blue Multi - Walmart.com