Reddit reviews 228 Silicone O-Ring, 70A Durometer, Red, 2-1/4" ID, 2-1/2" OD, 1/8" Width (Pack of 10)
We found 1 Reddit comments about 228 Silicone O-Ring, 70A Durometer, Red, 2-1/4" ID, 2-1/2" OD, 1/8" Width (Pack of 10). Here are the top ones, ranked by their Reddit score.
Made of silicone for use with a variety of chemicals and fluidsCan be used across a wide temperature range from -65 degrees F (-54 degrees C) to 450 degrees F (232 degrees C)Round in cross-section to provide a seal between cylindrical overlapping surfacesDurometer (hardness) of 70A for resistance to penetrationMeets standards defined by Aerospace Standard AS568A
Note that Hydroflask bottles DO work with any wide-mouth cap such as Nalgene bottle caps, including my absolute favorite, the CapCap (it even has a fun name!). However, you do need O Rings like these to prevent leaking since it's about a 99% fit. I like these caps better because the opening is much bigger, especially if you like your KC a little thicker.