Ключевые слова: bark, beverage, birch, birch sap, birch water, bottle, collect, cool, drilling, drink, drip, drop, droplet, extraction, fill, flow, food, forest, fresh, gathering, glass, groove, harvesting, healthy, hole, jar, juicy, liquid, nature, organic, outdoor, russia, sap, season, spring, sweet, tasty, traditional, tree, trunk, tube, useful, water, wood,