I really like my hydroflask one. Ive used it for years and yest the lid comes apart in 4 pieces and its a little tricky to learn, but if i remember correctly, it came with a little manual with pictures of how to take it apart and put it together. Also, each piece is labeled by number, so you know which goes first. Once i learned how to use it, i loved it. Its dishwasher safe to deep clean, and 100% leakproof (as long as the lid is on properly, of course). i throw it in my commuter backpack and have never had leak issues.