The rainy season has arrived! Whether you drink hot coffee during traffic jams or cold water during travels, carrying a good insulated cup will enable you to withstand the rain throughout the day. A good insulated cup should be waterproof, retain heat, and be convenient to carry.
1. Choose an insulated cup with a sturdy lid.
Reason: During the rainy season, you will always encounter water. A poorly sealed lid may cause water to leak into your bag.
Suggestion: Choose an insulated cup with double lock clasps or a waterproof rubber seal ring. 
2. Pay attention to using stainless steel material to maintain the temperature.
Reason: The weather during the rainy season is highly variable. It is recommended to use glass with good heat preservation properties.
Recommendation: Double-pane glass / vacuum glass / 304-grade stainless steel glass. 
3. Compact and portable, easy to carry.
Choose a capacity of around 350-500 milliliters. It can be easily placed in a backpack and is not bulky or heavy. 
4. Anti-slip design, allowing for easy holding even when hands are wet.
Suggestion: Opt for a glass cup with a textured surface or a handle to prevent it from slipping from your hand in rainy conditions. 
5. The glass surface should have a slip-resistant or waterproof coating.
When the weather is cold, water droplets tend to stick to the glass surface. If the glass surface has a coating, it can prevent slipping and protect the surrounding items from getting wet. 
Summary:
When choosing a portable cup during the rainy season, the main factors to consider include waterproofing, heat retention, ease of carrying, and non-slip properties. This makes it convenient for daily use and adds a fashionable touch to your appearance on rainy days.