I have nsf 42 whole house filtering and drinking water and ice are both filtered to nsf 53 as of this morning.

We drink out of stainless double wall bottles all day every day and fill before leaving and take them with us for normal day to day time away from home.

When camping, we use a lifestraw dispenser. That is in a trailer, so the larger filter isn't an issue.

Lifestraw straws stashed in each vehicle, house, camper, and rucksack for emergencies.

Grayl looks cool but I don't regularly spend any time in a situation where I'm not covered by those other solutions.