Keys, a small pouch and a bottle loop are the sort of objects that need an attachment point rather than another pocket. The stainless size3 Nite Ize S-Biner SlideLock uses two separate gates, so you can connect one end to your bag and organise a small item on the other.
The sliders are the useful detail
Each gate has its own sliding lock. Open the end you need, attach the object, then move the slider into the locked position. It is a more deliberate action than clipping on a basic open-gate utility hook, which may appeal if keys regularly snag other items in a busy bag.
Practice operating the sliders with your fingers before choosing it for a task you repeat frequently. A lock that is reassuring for travel can feel fiddly if you want to detach the same item dozens of times a day.
Pick the size around the attachment
The selected listing is one stainless LSB3-01-R6 size3, not an aluminium version or a pack of three. Check the opening and the object you intend to clip, not just the overall outline. A thick handle or strap may need a different size, while a very small key setup can become unnecessarily bulky.
Utility is not climbing safety
This is not a climbing carabiner. The maker warns against uses where disengagement could cause injury or property damage. Do not use it for supporting a person, securing a safety-critical load or improvising a leash connection where failure would be dangerous.
It makes sense for modest organisation: keeping a pouch with a bag, grouping small tools or separating sets of keys. If your current key ring already works, there is no need to upgrade for the mechanism alone. Its attraction is a compact, reusable attachment that can make an everyday arrangement easier to manage.
