There are few places where you can buy food that can be digested by a Russian person, not a gourmet of Asian cuisine. Fully adapted for us. There is also a mini pharmacy. In general, everything you need for life
There are 7/11 shops at every turn. The product range is diverse. Here you can have breakfast with coffee and croissant, lunch and dinner around the clock. They'll warm everything up for you.
You can also buy soap, shampoo, toothpaste and a brush, t/paper. Groceries, juices, water, ice cream. In general, you can buy everything in one place!
Basic necessities are nearby, around the clock. It's just a pity that alcohol (even beer) is not sold during the day, it can be inconvenient, but these are Thai laws.