I am selling a brand new, unused item that I originally purchased for my daughter, but she prefers to use the water bottle she already has. It is 0.8L. It comes with a cup and a shoulder strap, allowing for 2-way use to accommodate your child's growth. This type is easier to use than the straw type, which is difficult to clean. The cover can be easily removed and washed. Comes with the box and instructions. Although it has never been used, there are some stains on the cover from storage. They might come off with washing, but please refrain from purchasing if you are concerned. With the scorching heat already upon us this year, how about using it for going to school or going out? The original purchase price was 5000 yen, so this is a great deal! I can't measure the length of the strap because my measuring tape is broken, but it is adjustable. I think it can be used until upper elementary school. I initially stated that it could be used for direct drinking, but upon re-examination, I realized that it did not have a direct drinking part from the time of purchase. It seems like you might be able to drink directly from it, but if you need the dedicated direct drinking part, please refrain from purchasing. 3000