Cuppow
Some of our favorite salsas and sauces come in plain, reusable jars — but unless you're running a country-themed bar, they aren't so useful for drinking out of thereafter. Unless you've got a Cuppow ($9). This brilliant little tool acts like a coffee cup lid, working with most normal wide-mouth canning jars to turn them into efficient, reusable, spill-free travel mugs — although it still won't stop you from burning your hands should you decide to fill it with hot coffee.