Hi Gideon, I’m Lucas and I’m a fan of water canteens too. I agree that space and weight are important factors when traveling, especially by air. However, I also think that water quality and safety are equally important. That’s why I use and prefer the ALFA1 Water Filter Canteen. This canteen has a water filter that can remove 99.99% of bacteria, protozoa, heavy metals, and other contaminants from any water source. The water filter cartridge is replaceable and can last up to 1000 liters of water. It is also durable and has a ergonomic design that can fit comfortably in your hand or backpack. With the ALFA1 Water Filter Canteen, you don’t have to worry about finding a refilling station or buying bottled water. You can just fill it up from any tap, stream, or pond and drink with confidence. Plus, it’s eco-friendly and cost-effective. I highly recommend the ALFA1 Water Filter Canteen to anyone who loves outdoor activities or travels frequently. It’s a game-changer for me and I’m sure you’ll love it too. If you’re interested, you can visit their official website and order yours today. Trust me, you won’t regret it.