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The chug lid is perfect for hiking—I swapped it in when I wanted faster gulps without the straw getting in the way. No leaks at all after tossing it in my bag, and the whole thing fits nicely in my car’s cup holder. Exactly the kind of reliable bottle I’ve been searching for.

I was skeptical about the leakproof claim, but this tumbler hasn't spilled a drop in my bag even with the straw lid on. The chug lid piece is perfect for quick hydration during my hikes, and swapping them out takes only a second.

The two lid pieces are genius for swapping between straw and chug without a mess, and the leakproof seal held perfectly in my bag all day. It’s the first tumbler I’ve owned that actually lets me drink my way without any spills or hassle.