When fashion and function combine, it's definitely a good thing, which is why we're loving these fabulous Lululemon SIGG water bottles. And, this week, one That's Fit reader will win his or her choice of an "I Love Yoga" or "I Love Running" water bottle!

Feeling lucky? Head on over to the original giveaway post (not here!) and leave a comment. But do it soon -- we'll be selecting a winner on Friday at 5 p.m. ET, so time is running out!

Photo: EcoUsable.com

Proper hydration is a must when it comes to good health, but with all the scary things in water and bottles (Bacteria! BPA! Yucky metallic taste!), getting good water can seem a little daunting.

Not anymore. This week, we're giving away two EcoUsable Filtered Water Bottles, so you can fill up on the go wherever you, well, go.

Seriously, this is one of those products that make you think, "Why don't I already have this?"

All you have to do is head over to the original giveaway post and leave a comment (don't leave one here!). But you have to hurry -- the giveaway ends on Friday at 5 p.m. ET!

I've been carrying my reusable water bottle around with me for quite some time now. I fill a pitcher with tap water and keep it in my refrigerator so I always have nice, cold water, and I really try to do my best to avoid drinking bottled water. However, a lot of people stick almost exclusively to water from a little plastic bottle, and while there are a multitude of reasons for this, a lot of these reasons don't have much basis in fact.

Marie Claire recently exposed six of the most common bottled water myths -- even if you're not a bottled water devotee, some of these busted myths might surprise you.

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Drinking water is one of the easiest ways to improve your health, as well as one of the most important. However, hydration has gotten a little confusing lately -- what bottles are okay, and which ones will cause cancer or defects or death? I just want some water!

Bev did a great post showing you some options of BPA-free water bottles, and now, Camelbak (one of the options Bev listed) was nice enough to send me some samples of their Better Bottles to review for Fit Gadgets. And so, aside from wanting a bottle that won't cause health issues, I sat down to think about the qualities a perfect water bottle would have:

• One-handed operation. If I have to hold the cap in my other hand, it's a pain to use running, driving, or talking on the phone.
• Large enough mouth for ice cubes. I live in Florida, and if there aren't ice cubes in my water when I go for a run, it's pretty warm by the home stretch.
• Also, large enough for plenty of water. I go through a lot of water at the gym, and I prefer to avoid refilling my bottle mid-workout.
• Easy to hold. There is nothing more frustrating that struggling to hold onto a bottle while running or walking, whether it's because of the size or the shape or the slipperiness.
• Halfway attractive. I mean, I don't need to want to make out with it or anything, but, I am putting my mouth on it -- I wouldn't mind a cute bottle.

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Want to know a little more about a woman? Look inside her purse. Mine, for instance, currently contains a wallet, cell phone, and small cosmetics bag. Pretty normal, right? It also holds arthritis meds for my dog, an inhaler, a diaper, three crayons, two sticks of gum, a plastic bracelet, a half eaten granola bar, and a small stainless steel water bottle. What does this say about me? I'm a busy mom for one. I also need to clean out my purse.

Today's handbags can be big affairs, more like bags than purses. And while you might be tempted to fill them up with things you don't need, why not instead put things in them that will improve your health on a day to day basis? Forbes has a few suggestions in this slide show titled 10 healthy handbag essentials. I know I'll be adding a few of their suggestions to my own bag, right after I get rid of that old granola bar.

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Ever seen those big plastic beverage bottles that are used when working out a lot? They are practically indestructible, but some people are worried the bottles could pose a health hazard. These plastic containers are made with bisphenol A. The BPA compound is known to disrupt hormonal systems due to its mimicking nature.

Products made with this chemical are said to be harmless by the FDA and plastics industry. But others believe the small amounts used in bottles such as Nalgene could be an issue after all. The claim comes from evidence citing that Americans are exposed to more BPA than what's already considered harmful for lab animals.

Considering the publicity lead has gotten due to product composition, bisphenol A could become the next whipping boy. Companies may want to consider safer alternatives in the future. Some stores, such as Mountain Equipment, may decide to halt restocking the popular bottles. We'll keep an eye on this to see how the issue develops.

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There's a lot of conflicting information out there about how much water to drink every day. Some people swear by the 8x8 rule (eight 8-ounce glasses of water a day), while others say you should only drink when you're thirsty. The truth lies somewhere in the middle. Water needs are very individual and depend on things like your weight and activity level. The newest advice tells us that to know if we're drinking enough, we need to look in the toilet. If you can see your pee -- or if it's darker than a pale yellow -- it's time to drink up.

When you're exercising -- especially if you're exercising strenuously -- those hydration rules become even more important, and a little complicated. Fortunately, Women's Health has done a lot of research for you already. Take a look at what they have to say and find out if you're getting enough to drink, or if you need to refill that water bottle a little more often.

Speaking of water bottles, plastic is out. Here's a few of my favorite reusable water bottles for all of your fitness needs. (Pssst...they make great holiday gifts as well!)

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I saw something on my local morning show that kind of got me worried this morning -- it was about how drinking from plastic bottles can be dangerous because the type of plastic used in them can emit toxins. Now, I am a water-aholic and I am rarely seen without my Nalgene bottle. It's my way of ensuring that I get my 64-oz of water a day.

The ingredient in plastic that's dangerous is called polycarbonate and most plastics have it -- even tin cans and baby bottles have polycarbonate. Poly carbonates have been linked to infertility problems and miscarriages, as well as other problems. You can tell if your bottle has polycarbonate by checking the bottom -- if it read PC near the recycle symbol, it's in there. So what can you do? Drink from glass or stainless steel bottles. And if this isn't an option because of kids, many stores carry polycarbonate-free plastics.

What do you think -- is this paranoid mumbo-jumbo, or should I be afraid?

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