Reddit reviews GSI Outdoors Collapsible Fairshare Mug
We found 2 Reddit comments about GSI Outdoors Collapsible Fairshare Mug. Here are the top ones, ranked by their Reddit score.
Multi-purpose mug/bowl/measuring cup collapses for efficient packingHolds 22 fluid ounces; molded gradations provide accurate measurementHandle folds flat for storage, extends and locks for use as a scoopSure-seal lid keeps food and beverages in, outdoors outMeasures 7.1 by 5.4 by 1.7 inches extended; weighs 7 ounces; backed by full manufacturer’s warranty
Here's a 22-oz one.
http://www.amazon.com/GSI-Outdoors-Collapsible-Fairshare-Mug/dp/B003LXCCUE
Paper is clearly the most recyclable and so the least environmentally harmful but if you have harsh winters where you live then polystyrene might be useful as a good insulator. But a reusable cup of some kind would offer better insulation (if that's important), not leave a papery taste in your mouth, and probably do least environmental damage over its lifetime.
I've not tried it but this looks like a good balance between portability and re-usability.