Advanced TechnologyWith advanced filtration membrane technology, this filter straw is divided into four stages, including pre-filter, coconut shell activated carbon, hollow fiber ultrafiltration membranes , etc. It is able to remove all visible solid sediment, and improve odor, ensuring water in the worst environments. 100% Tritan & BPA Free100% Tritan is a BPA-free filtered water bottle, which is food grade material. It does not produce any harmful substances or bad smells to ensure the safety of your drink and the good taste of the water. Daily Use & Wild SurvivalPortable Filtered bottle weighs only 22 ounces, very easy to carry. More importantly, it can turn lakes, rivers, springs, streams into drinking water to keep energy outside. It is ideal for travel, backpacking, backpacking, fitness. Kind reminderRinse the carbon filter with less than 1 gram water to remove the taste from it. even on first use. And vacuum 4-5 times to make the water rise through the filter. Product Description Product Parameter Material: BPA Free Tritan, PP,PE,ABS etc Filter accuracy: 0.01 micron Bottle capacity: 650ml Flow rate: 550ml/min Weight: 0.46 lbs Dimension: 9.25 * 2.95 * 2.95 inches Filter life: Up to 1500L/396Gallons (depending on water quality) PRACTICAL AND UNIQUE DESIGN This cup has an excellent dual purpose function. When you remove the filter inside the cup and change it to a straw, it becomes a sports cup. Tumbler cap and push button lock prevent leaks. Portable, durable and easy to clean. SURVIVAL ASSISTANT This versatile water bottle not only helps provide safe drinking water in harsh environments, but the compass of the top helps you find the right direction. It's perfect for travel, hiking, and emergency kits. Advanced 4-stage filtration system Advanced 4-stage filtration system can Effectively remove 99.99999% of harmful organisms, waterways to ensure safe and clean drinking water. The portable filtered bottle weighs only 22 ounces, it is very easy to carry. More importantly, it can turn lakes, rivers, springs, streams into drinking water to keep energy in the outdoors, ideal for travelling, hiking, hiking, fitness