Water is considered drinkable when it has a salinity level of less than 500 mg/L (milligrams per liter). This level of salinity is generally safe for human consumption and does not pose any health risks. Water with higher salinity levels may taste salty and can have a laxative effect if consumed in large quantities. **

Heavy water, also known as deuterium oxide, is not recommended for drinking in large quantities. While it is not considered highly toxic, consuming large amounts of heavy water can potentially have negative health effects due to the increased presence of deuterium, a heavy isotope of hydrogen. It is best to stick to regular water for hydration purposes. **

Yes, walnut juice is drinkable and can be consumed as a beverage. It is made by blending walnuts with water and straining the mixture to extract the liquid. Walnut juice is known for its rich, nutty flavor and is often enjoyed for its potential health benefits, such as being a good source of antioxidants and omega-3 fatty acids. It can be consumed on its own or used as an ingredient in smoothies, cocktails, or other recipes. **

Water is considered drinkable when it has a salinity level of less than 500 mg/L (milligrams per liter). This level of salinity is considered safe for human consumption and does not pose any health risks. Higher levels of salinity can make water taste salty and can have negative effects on the body if consumed in large quantities. **

Calvados is a type of apple brandy that can last for a long time if stored properly. Check the bottle for any signs of spoilage such as a change in color, sediment, or off-putting odor. If the Calvados looks and smells fine, it should still be drinkable. However, the taste may have evolved over time, so it's best to give it a try to see if it suits your preferences. **

Without more specific information about the wine in question, it is difficult to determine if it is still drinkable. Factors such as the type of wine, its age, storage conditions, and any visible signs of spoilage would all play a role in determining its drinkability. In general, most wines are best consumed within a few years of their vintage date, but some wines can age well for several decades if stored properly. If the wine appears to be in good condition, with no signs of cork taint, oxidation, or other faults, it is likely still drinkable. **

Expired cappuccino may still be safe to drink, but the taste and quality may be compromised. It is important to check for any signs of spoilage such as a sour smell or off taste before consuming it. If the cappuccino has been stored properly and shows no signs of spoilage, it may still be drinkable, but it is always best to err on the side of caution when consuming expired beverages. **

No, toilet water is not drinkable. It is not safe for consumption as it may contain harmful bacteria, viruses, and other contaminants. It is important to only drink water from a clean and safe source, such as tap water or bottled water. If there are concerns about the safety of the water supply, it is best to use a water filtration system or boil the water before drinking. **