I've capped var by mixing it with dextrose as a filler.
For example I made 50mg caps by mixing 5g of var powder with 20g of dextrose in tupperware and shook it like hell. Then I divided it into two equal batches which filled 50 caps each. With such a high dose, the deviation isn't that bad for each day. You can use more filler with bigger capsules too if you want to minimize discrepancies in doses.
People have mixed var powder with Propylene Glycol, but I have no experience with that. Although I once mixed var powder in a vial with olive oil for a 25mg/ml solution (not a real suspension) and just shook it each time I dosed it out. It settles to the bottom when it's left alone, and I'm sure my doses weren't extremely accurate, but I still made excellent gains at 50mg a day. I wouldn't recommend doing that though because it's pretty inconvenient and tastes like shit.