I carry a liter of Yamalube 2R and a turkey baster for precision oil measurement. It looks hokey, but works well.
I only get about 40 - 50 miles per tank, and I have an additional desert tank that I have not tried yet. After 1 tank, I'm ready for a break!
I have a small dual chamber oil mixing bottle for Sears weed trimmer that I would like to try sometime. You squeeze the oil into the upper chamber to the appropriate measurement, then pour from that chamber in your tank. Simple and compact. Hope it seals OK after I fill it with Yamalube. I'm thinking this little bottle will make it much easier and convenient to measure and add oil on a trip, carry one of these in a plastic bag, just in case. You don't want to fall on it. BE SURE TO EMPTY OUT THE WEEDWHACKER OIL AND CLEAN THE BOTTLE BEFORE FILLING WITH YOUR PREMIUM TWO-STROKE OIL OF CHOICE.
Disclaimer: Don't dump the oil in the drain, gutter, garden, or neighbor's gas tank, or Danger's thermos.
It has a built-in measuring cup. Mebbe take the lable off, too, just in case your riding buddies are watching.