Straw Lid for Hydro Flask Standard Mouth, Simple Modern Ascent. Improved Cap Multi-Compatible with 1.91" Mouth 12,18,21, 24 Oz Insulated Water Bottle One-Hand-Operate Sport Flip Top 2 Pack

The picture shows oval shaped mouth pieces. I had one of these before and they are comfortable and don't leak. The lids delivered have a squared off side and the little hole at the end that leaks even when the lid is down. VERY unhappy.

I bought these to replace the lids on my National Park water bottles. Now I don’t have to unscrew lids for a drink and worry about losing them. They fit perfectly and work with or without a straw.

Good value getting two lids for a good price!

Using these on some RTIC bottles that my kids have used for school. You get a lot of goodies for the price here. Both hard and flexy straws, cleaning brushes, nifty caribiners if thats your thing and you like having a clanky noisemaker if you take your bottle somewhere. So thats a nice thing for the money. The issue is durability. The big loop on the top is a bit oversized, especially compared to the originals. This of course makes a bigger lever so when a kid drops it, lots more force, and its not super thick to begin with. So the first top lasted about three weeks before it got broken. The good news is that its not leaking, and the rest of the parts and bits seem to be functional, but would be a lot better if it didnt break almost immediately.

These do the job, but I have found the plastic handle easily breaks. Could b due to my kids dropping their water bottles, but I’ve purchased multiple times and they continue to break. For the price and to have a straw that fits my Klein kanteen, I guess it’s worth it. Just don’t expect it to last long if you tend to drop often. I do like the carabiner and straw cleaner that comes with.