You’re not going to find contact solution in the Russian version of Walmart (Лента/Окей/Ашан). You’ll find it at the pharmacy (аптека). Ask for раствор для контактных линз or just find it and point to it. Renu and OPTI-FREE are both products you can find in Russia. Fyi, usually when you buy a bottle of solution, it’ll come with a new contact case.