Spring Sluggishness: A Sign of Dehydration? What is the Rumored “Subtle Hydration”?

Could your spring slump actually be “spring heatstroke”? Introducing the benefits of “subtle hydration”—frequent, small-sip water intake recommended by doctors—and Tiger’s new straw bottle (MTS-W model), which allows you to hydrate smartly even during desk work or while on the go. Why not start a healthy habit that’s easy to maintain?

The “Spring Trap” Hidden Behind the Warm, Sunny Weather

Hello everyone. This is the editorial department of Tiger Corporation’s “Nukumori-bin” (Warm Delivery).

Recently, opening the window brings in the gentle scent of flowers, signaling that it’s finally time for a wardrobe change. Looking up at the sky in the nearby park during a stroll has become my ultimate bliss these days.

But, I must confess… Lately, by evening, I’ve increasingly been feeling like, “My body feels kind of heavy,” or “My head is in a fog.” I thought maybe it was just the spring weather making me sleepy, but it turns out there might be an unexpected reason for this.

50% of People Feel the “Daytime Heat” in Spring

It seems there are actually quite a few people who, like me, already feel the heat during the day as early as March.

According to a survey conducted by Tiger, a surprising 50% of respondents reported feeling “hot during the day” even though it’s still spring. Spring is a season with drastic temperature fluctuations from day to night, making it hard for our bodies to keep up. Furthermore, our bodies, which have grown accustomed to the cold during winter, cannot fully adapt to the sudden rise in temperature, making our autonomic nervous system prone to disruption.

What we need to be careful of here is “spring heatstroke.” During this period when our bodies aren’t yet used to the heat, we can lose fluids without even realizing it, potentially leading to heatstroke-like symptoms.

The careless thought of “It’s not summer yet, and I’m not that thirsty…” is our biggest enemy. I had to reflect on my own behavior of putting off hydration, thinking “I’m still fine.”

A Doctor Recommends a New Habit: “Subtle Hydration”

As a countermeasure against these spring ailments, the concept of “subtle hydration” is currently gaining attention.

According to Dr. Hideki Taniguchi of Saiseikai Yokohama-shi Tobu Hospital, the key to preventing heatstroke is to “drink in small amounts frequently, before you feel thirsty.”

Profile

Dr. Hideki Taniguchi, Saiseikai Yokohama-shi Tobu Hospital

Director of the Patient Support Center at Saiseikai Yokohama-shi Tobu Hospital, Visiting Professor at Tokyo Healthcare University Graduate School, Anesthesiologist, Medical Doctor, Board-Certified Anesthesiologist.
Specializing in water and electrolyte management, nutritional management, and oral rehydration therapy, he has published papers on dehydration and “hidden dehydration.” He has also authored numerous books on dehydration and oral rehydration therapy. He frequently provides commentary for newspapers, television, and magazines.

What struck me most about Dr. Taniguchi’s explanation was the mechanism of fluid intake. Actually, if you chug a large amount of water at once just because you’re thirsty, your blood suddenly becomes diluted. Your brain mistakenly thinks, “There’s too much water!” and flushes it out as urine before it can be absorbed by the body. I wish I could tell this to my past self, who used to chug water thinking it was good for me… (tears).

Therefore, the doctor recommends “subtle hydration”—drinking a small amount, about 15-30ml per sip, frequently.

This way, the body doesn’t easily notice the sudden influx of fluids, allowing the water to firmly remain in the body and efficiently reach every corner of the cells. As a countermeasure against spring heatstroke, the ideal is to aim for “1 liter a day” by drinking little by little before getting thirsty.

However, when you’re concentrating on work, “drinking little by little frequently” often turns into, “Oh, I haven’t drank anything for an hour!”

To help us naturally make “subtle hydration” a habit, Dr. Taniguchi recommends “hydrating with a straw.”

Using a straw unconsciously reduces the amount of each sip, making it easier to create an ideal pace—like dividing a single glass of water into 8 to 10 separate drinks. It’s also less of a burden on the stomach, truly killing two birds with one stone!

That’s when I realized, “With this, I can keep it up every day!”—and my perfect partner is Tiger’s Vacuum Insulated Straw Bottle.

The Ideal Partner for “Subtle Hydration”: MTS-W Model

“Smart” Hydration, Even While Masked or at Your Desk

The biggest feature of this bottle is, without a doubt, the “straw.”

Don’t you think this is actually quite revolutionary? The motion of tilting a bottle all the way up to drink can surprisingly break your line of sight during a meeting or while working on a computer, and it can give off a strong “I’m drinking!” vibe. But with a straw type, you just need to bring it to your mouth slightly while keeping your eyes looking forward. It’s easy to drink from even through the gaps of a mask, and a pleasant bonus is not having to worry about your lip balm rubbing off. This is truly the ultimate partner for “subtle” hydration.

A Magical Design That Ends the “Where Did the Gasket Go?” Struggle

The biggest hurdle of living with a reusable bottle is the daily washing. Especially taking apart the tiny pieces like the straw and gasket, washing them, drying them, and putting them back together… Ah, just remembering it makes my past self from last night sigh.

For all my fellow “lazy” friends out there, I really want you to know about this bottle’s “Rakuraku Cap” (Easy-Clean Cap). Believe it or not, the gasket and the stopper are integrated!

Not only does this save you the trouble of removing the gasket when washing, but it also frees you from that sense of despair after washing: “Wait, where did I put the gasket?” Furthermore, both the main body and all the parts are dishwasher safe. With this, even in our busy daily lives, we can feel motivated to “take it with me again tomorrow.”

Generous Sizes to Keep the “Perfect Temperature” All Day Long

The newly released “MTS-W Model” comes in slightly larger sizes of 0.75L and 0.88L.

You might wonder, “Can I really drink that much?”, but when you make subtle hydration a habit, you surprisingly need about this much. With Tiger’s proud vacuum insulation structure, the cold drink you poured in the morning stays ice-cold until evening. There’s no need to force yourself to drink lukewarm beverages.

Happy Gatherings Start with Care for Yourself First

To share heartwarming DANRAN around the world.

This is the philosophy we cherish at Tiger Corporation. But in order to make someone smile or gather around a joyful dining table, the most important thing is that you yourself remain healthy and in a good mood first.

To truly enjoy the soft spring sunlight, why not place your favorite straw bottle by your desk and start with just one sip of “subtle hydration”?

Here’s hoping that the days you can think, “I feel pretty good all day today,” gradually increase.

Check here for more details on the Straw Bottles “MTS-W075/W088”!