Need a daypack or quick tote to bring back souvenirs? This folds small, opens large, is sturdy and attractive. Made by ChicoBag from recycled PET! About $23
For drinks, try this space-saving, dual use option. Vapur foldable water bottles come in 18 oz., 23 oz. and 34 oz. sizes and easily roll up to fit a carry, purse or knapsack can also be frozen so they’ll function as ice packs.
For hot beverages, Klean Kanteen has a bottle with interchangeable tops depending on whether you sip hit coffee or chug cool drinks. They come in 2 sizes about $22 or $27.