MSR Miox Water Purifier. Took one sip and never used it again. I can't remember iodine pills tasting so awful. Now I use a Steripen.
I have bought two backpacks that were too big for me. The first time I thought that large simply meant that the pack would hold more! The next time I didn't bother to load the pack before trying it on. Talk about being miserable on the trail!