Yes - them's the ones!
I know they're not rigid, but I've always got by with them. For me they're a strong, weight-efficient and reliable water-carrying tool. Water's important, and I've never heard of failure in normal use (which you can hardly say for Sawyer!). Also, it shares the Sawyer's cap thread, so I've still got an option if the Sawyer bottle shreds. The common cap thread size also means you can do rudimentary backflushing of the Micro in the field, using the (4g) Sawyer coupling supplied with the Micro, rather than have to carry the (32g) plunger/syringe thingy.
If I want to drink from a rigid container (eg lunch breaks) I just pour into my cup which is ready in my hip-belt pocket. Old habits die hard and I still like to avail myself of unfiltered stream water on the trail when I can.
I'm aware this doesn't suit everyone, particularly fell-running types who like to drink 'on the go' by means of an easily grabbable bottle or a bladder/tube setup, but as a more relaxed hiker I've not felt the need.