Our 300ml Soft Flasks are BPA Free, and made from Non-Toxic Plastic. They also feature measurement markers in 60ml increments for those that are specific about their race-day or training nutrition. They also come in a simple see-through packaging which makes it very easy to see what you have inside. These are perfect to take along to your next cup-free race as they will stow down to fit in most pockets on your shorts or hydration pack. The more you buy, the more you save!