What’s Inside Your Personal Bottle? A Guide to the Best Drinks and What to Avoid

“Personal Bottles” allow you to carry your favorite drinks with you and enjoy them wherever you go. However, did you know that with stainless steel Personal Bottles, there are some drinks that are safe to fill, and others that are strictly “NG” (Not Good)?

So, what exactly do avid users put in their Personal Bottles? In this article, we’ll introduce the contents commonly found in Personal Bottles.

Standard Personal Bottle Fillers

Here are some standard drinks that users love to carry in their Personal Bottles. Please use this as a reference!

Coffee

From instant to authentic drip coffee, there are many ways to enjoy it. When you make it yourself, you can freely adjust the strength and sweetness. By using a vacuum insulated Personal Bottle, your coffee won’t get lukewarm; you can enjoy it hot or iced at the temperature it was made. Buying coffee on the go can cost hundreds of yen each time, but making it yourself costs only a fraction of that. It saves money and is eco-friendly since you aren’t consuming cans or plastic bottles.

Tea

Tea is another popular choice. Whether using tea bags or loose leaves, there are endless ways to enjoy it. With a rich variety of options—green tea, black tea, barley tea (mugicha), herbal tea, and flavored tea—you can carry a different kind of tea every day.

Sports Drinks

Active users often fill their Personal Bottles with sports drinks. In the past, this was considered a “no-go” for stainless steel bottles. However, recent bottles feature a coating on the inside, so they are generally considered safe to use as long as you wash the inside of the bottle immediately after drinking.

Water and Hot Water

Some users keep it simple with water or plain hot water. Water is essential for boosting metabolism and flushing out waste products. Carrying it from home ensures you can stay hydrated with peace of mind wherever you are.

What Drinks are “NG” for Personal Bottles?

Stainless steel bottles can corrode due to acid or salt. Therefore, drinks containing these elements are “NG.” Corrosion can cause holes in the inner bottle, ruining its heat retention and cooling capabilities.

Acidic drinks include fruit juices and vinegar. Salty drinks include soups and miso soup. Unfortunately, you cannot carry these items in a standard Personal Bottle.

Milk and dairy beverages are also NG. If the liquid spoils, it may generate gas, causing the lid or stopper to become stuck, or the contents to spray out. Furthermore, if dairy gets into the gaps of the gasket or other parts, it can cause unpleasant odors. It is best to avoid café au lait and milk tea as well.

Boost Your Mood with a Stylish Bottle!

Your bottle lets you carry your favorite drinks—whether it’s coffee, tea, or sports drinks—wherever you go. Since it is your daily companion, you naturally want to ensure it stays in great shape for as long as possible.

The key is being mindful of what you pour inside. To prevent deterioration, it is best to avoid liquids with high acidity or strong salt content, as well as dairy products and alcohol. With the right knowledge and care, you can enjoy a comfortable life with your stylish bottle for years to come!