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I’ve dropped this cap a few times already and it hasn’t leaked a drop, so the bamboo build feels solid for daily commutes. The threading matches my glass bottle perfectly and it’s easy to twist off one-handed.

The seal is surprisingly tight for a natural material—I’ve tossed my bottle in my bag sideways and not a drop leaked. It fits the glass bottle perfectly and the bamboo feels smooth and solid, not flimsy like I half-expected.

I was a little worried a bamboo lid wouldn't seal tight, but it locks onto both my glass and steel bottles without a single drip in my bag. The natural wood feel is actually nicer to grip than plastic, too.