If no cup is available for washing one's hands, one can immerse them into a river or into snow, if there's enough snow on the ground to fill a Mikve. (About 500 litres/130 gallons of water.)
When the month of Av begins, one diminishes joy. From Rosh Chodesh Av until midday on 10th Av is the period known as the "9 days". During the 9 days one does not do any laundry even if one only intends wearing the clothes after the 9 days. One may not even give laundry to a non-Jew to wash during the 9 days, but a Jew may do laundry for non-Jews. One does not wear freshly laundered clothes during the 9 days except on Shabbat. This does not apply to garments worn directly on the body; undergarments, socks, PJs and the like. One may not change bed linens, tablecloths and towels during the 9 days. The 9 days start this Shabbat and end 10 days later on Monday afternoon. --> Therefore it's advisable to prepare a week's supply of shirts, pants, skirts, etc. by wearing them for a short while this week. One can also prepare towels by using them once. Baby clothing that gets dirty all the time and needs to be changed many times a day are exempt from the above and may be laundered and used during the 9 days. Anything halachically needed for her 7 clean days, a Niddah may launder and wear during the 9 days. Source: Kitzur Shulchan Aruch 122:9 - Danny Wednesday, 27 Tamuz 5768
If no cup is available for washing ones hands, one can immerse them into a river or into snow, if there's enough snow on the ground to fill a mikve. (About 350 litres/90 gallons.) This applies to washing three times after arising as well as before eating bread. Sources: KSA 2:6, 40:7
