If you’re traveling with wines that benefit from decanting, there are few tricks you can use to smooth out and enhance the wine without a proper decanter. One option is to decant before you travel: you can pour out the wine and then pour it back into the bottle, which is essentially double-decanting. This will accelerate oxidation, so don’t try this if you're traveling for a long time. Similarly, you can pour wine into a glass and then carefully back into the bottle, or from one glass into another to speed up the process.