Leak-proof and transparent drinking bottle for children. The Sigg Viva One is the perfect companion for all leisure activities and school. With the One Top closure, the water bottle can be operated with one hand: this applies to carrying, opening, drinking, closing, and securing the bottle. Additionally, the drinking bottle is suitable for carbonated beverages. The wide opening makes it easy to clean and fill the bottle. It is leak-proof, so the backpack stays dry even during more active times.