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I've been using this for my morning coffee and the leakproof lid is no joke—tossed it in my bag on a bumpy bike ride and not a single drop escaped. Swapping between the straw and chug pieces takes seconds, which I appreciate when I switch from hot coffee to cold water later in the day.

The two lid pieces are a nice touch—I mostly use the straw one, but it’s easy to pop off and switch to the chug option when I’m in a hurry. It’s kept my coffee hot for a couple hours, though I wish the lid seal felt a bit more secure when tossed in a bag.

The two lid pieces are handy—I switch between the straw and chug top depending on what I'm drinking—but the chug lid isn't quite as leakproof as I'd hoped when tossed in a bag. It does the job for desk use, though I'd pack a backup if I were traveling with it.