I used a sawyer for a season then switched to Katadyn. Their thread pattern will match larger and more durable bladders made by Hydrapak. The 1L bladder that comes with the katadyn is much easier to fill and squeeze than the Sawyer
I actually put a pin hole in 2 of my cnoc bags near the spout on the edge of where the material thickens. That said I squeezed the crapcout of them for 5 or so years before an issue which was probably from bending and putting a lot of tension on that area while full. A dab of silicone and theyre gtg. Awesome products.
Cnoc Vecto in whatever size you want-2L is easiest to handle. Tip. Get some generic denture tabs, fill new Cnoc bag to the too with tap water, add 2 tabs for 2L size. Leave overnight in the sink, rinse well. Gets rid of all the TPU taste that these bags produce when new. The denture tabs work well for cleaning any pliable water bag also.