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The swap-out lid pieces are genius—I can go from straw to chug in seconds without spilling. The leakproof seal has held up perfectly in my bag so far.

I've been using this daily for my commute and the leakproof lid hasn't dripped once, even tossed sideways in my bag. The two lid pieces are a nice touch since I can chug water at the gym and switch to the straw for my desk. Genuinely the tumbler I reach for now.

Swapped the straw piece for the chug lid on my second cup today and both stayed completely leakproof in my bag. The little sipping parts pop out easily enough that I don't dread cleaning them.