In four weeks, I'm leading a group of 8 people on a trip to the southern Winds of Wyoming (Big Sandy, Pyramid Lake, Shadow Lake, Cirque of the Towers...) for 6 days.
We aren't all UL, but many of us are working on going lighter.
For example, my wife and I will be using the Hexamid twin with netting and a polycryo ground cloth. We had it out in the Adirondacks last year with a Tyvek cloth, so I'm just to the point of tweaking things.
We're taking 3 Jetboil stoves for the group: One Jetboil Flash, one Sol, and one Sol Ti. This just happens to be what various people in the group own without purchasing additional equipment.
For water filtration, I couldn't get them convinced that we could use chlorine dioxide, so we're using filters. We're bringing two Sawyer squeeze filters, and one Platypus Gravityworks filter.
The Squeeze filters will work great for topping off bottles on the trail, but I thought it would be nice to set up my Squeeze as a 2nd gravity filter for in camp. I have the barbed adapters and some tubing. I have a 2L Evernew bag in addition to the Squeeze bags. However, I thought it would be nice to have a larger capacity bag than 2L, like 3 or 4L. I can't find any 4L lightweight reservoir bags sold separately, except for the MSR Dromlite, which seems heavy at 5.1oz for 4L without the hose attachment sold separately. The Platypus Big Zip is 3L, but also pretty heavy at 5.8oz, probably due to that big plastic clip used to seal the top. The 3L Platypus Hoser is a possibility at 3.8oz including the hose and bite valve. I would probably have to fill it using my soda-bottle scoop just like I do with my Evernew 2L bag.
Are there other options I'm missing?