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The material that they are made from means that they'll be light in your backpack. There are 6 in the pack so though small in capacity (3.5 in diameter by 3.9 inches high) you could take 2 of each to give you enough for the journey.
They do have lids that screw on tightly with a foam insert that ensures a good seal too. The product is BPA free and of a food-grade standard.
If you need them labels are supplied with this product.
Besides camping, these containers can be used in so many other ways, so when you're done with them after your trip they can be washed very easily and reused.
View other ideas for small storage jars for tea and coffee here