Basically speaking, all the top material water bottle should be the best water bottle, but actually in our daily life, we would like to buy some big brand bottles even the price is much higher, such as Yeti, Hydro Flask, Contigo, Thermos, Lock , Chilly , Stanley , etc; Why their products are actually better after you compare? Because they are made in trust worthy big professional factory , and verified certificates to promise the products quality . So a good water bottle, you need to check their material certificates and already products certificate. If they have all the certificated , they are a good water bottle !