I love these caps for my kids water Nalgene water bottles. When they play sports the bottles are often thrown into a basket or onto the ground and these caps keep them clean and germ free! They are a bit fragile at the cap hinge so I have purchased extra when they are on sale.
Several reviewers have said that these caps break off. This may be true if you entrust them to children, but for any adults out there, I have Nalgene bottles with these caps on cycling trips for at least 5 years with no problem. (They are great for cycling because they keep road filth from getting on the mouthpiece.) I will say, on the negative side, that the squeeze bottles made by Nalgene that these lids fit do impart a plastic taste to water, just so you know.
It is so great to be able to buy a cap for my husband's water bottle! He liked his big bottle for hiking but found that he could not drink and walk at the same time. Now he can and we didn't have to buy a whole new bottle!
I have used this type of cap on the Nalgene 22 oz ATB Sport Bottle for a couple of years now and only recently had one break. Love the cover to keep drinking surface clean.
My 3 year old son has the nelgene sippy cup (which we loved) but now that he is getting older I wanted to upgrade his cap - this worked perfectly for him! Haven't had any problems with leaking or broken caps so far.
While the concept is good, I find the cap leaks a bit.
These need to be firmly tightened or they will leak. Great tops although some came close too easily during use and you may need to pull open with your teeth or not let it touch your lips during use. Great one handed or no handed operation and secure closing feature - very convenient. I hope they make the detent more reliable on this great product.
I ordered a few of these caps for my sons water bottle. The reason I ordered a few is because they work well but are somewhat fragile. The clear plastic lid sometimes comes off and after 6 months or so of use the old one we had broke. We did get quite a bit of use out of it and that's why I replaced it with the same thing... plus I really like that it has a cover to keep the spout clean.
I bought these caps as replacements for 2 sport bottles we previously purchased - the plastic dome lid cracked at the hinge and no longer worked. Of course, this is after being dropped numerous times on our tile floor - any hard plastic would crack. I really like the cover that keeps the mouthpiece clean, and my daughter likes the amount of liquid that's dispersed - not too much, not too little. We'll definitely keep using these.
We bought a couple of these and they leak when we drink out of them. They are fine for the sale price we paid for them ($.99) but I wouldn't pay more. The mechanism for snapping the lid shut also seems kind of flimsy.
I got these for my boyfriend who is used to sport water bottles. He loved them at first, but then found that they were leaking. I used them with the wide mouth 32 oz. Nalgene bottles. I don't know if we just got a defective product (we bought two and they both do it), or if it's the bottle's fault. They seemed like a great idea, but just don't work as well as I would have liked. (He does still use them, so they're not too bad).
I love the bottles, but the plastic lids ALWAYS break off, then they are pretty pointless. I have ordered and re-ordered the tops, but it just doesn't seem worth it. The bottles would be perfect, because they fit in the Lap-Top Lunch Boxes, but they just don't last. Bummer!
I wrote a review of these cups after we'd had them for a month. Maybe I should have waited one more month, because by that time every one of the domed plastic covers for the lids had broken. The hinges operate with very small plastic nubs, and they break off amazingly easily. It's so disappointing, because these are the only cups of this size I've been able to find that are dishwasher safe (#1 strike against the Sigg bottles). If they could fix these lids, they'd be perfect.