Originally Posted by
txflyer77
I've never found myself needing to replenish toiletries while traveling unless I've forgotten something (which is orthogonal to the choice of HBO or checking a bag).
By using a few alternative items in my toiletry kit I'm able to easily stay under 3-1-1 while still having enough to last me weeks. Shave oil instead of shaving cream, tooth powder instead of tooth paste, bar soap instead of body wash, a sunscreen stick instead of sunscreen lotion, etc. In many cases I've found I prefer these items anyways and wind up using them full-time at home.
15ml of shave oil will get you almost 100 shaves. I find a full bar of Dr. Bronner's soap lasts me about six weeks.
The OP will also have to factor in the time of shopping expeditions at home to buy those unique carry-on travel items. The carry-on only and ever people seem untroubled by the time invested to avoid the ignominy of checking luggage.
But if they are out shopping anyway they should pick up DEET-infused wipes if visiting a malarial zone. They don't count toward your liquid allotment. And learn the wines available in your destination that have screw tops because trying to explain "corkscrew" in Armenian can be a bit awkward.