CamelBak HydroBak Hydration Pack, 50 ounce Rookie or not, you've got to stay hydrated on your hike. Don't want to carry a bottle around? We recommend the CamelBak HydroBak Hydration Pack, 50 ounce ($34). Image Source: amazon.com CamelBak HydroBak Hydration Pack, 50 ounce $34 from amazon.com Buy Now