Kids need to drink plenty of water, but school days have a way of making them forget. A good-looking, toxin-free stainless steel bottle is a reliable fix. Here are three sustainable water bottles for children that have won us over. Not only are they kind to the environment, they’re easy to clean and leak-proof too. With their playful designs and kid-friendly lids, they’re bound to capture young imaginations and encourage a few more sips throughout the day — perfect companions for the school run and beyond.

Alfi Stainless Steel Bottle “Biene Maja”

Eco-Trinkflaschen für die Schule

The isoBottle stainless steel bottle from ALFI is a handsome, dependable companion for school, keeping drinks hot for 12 hours or cold for 24 — entirely BPA-free. With its sweet Biene Maja (Maya the Bee) design, it’s an instant favorite with kids. The AromaSafe system keeps flavor locked in and fresh over time, while the free-flow drinking system is simple to use, and the screw cap seals reliably even with carbonated drinks. Built to ALFI’s usual high standard, this bottle is toxin-free, sturdy, and built to last. RRP: €27.95. Available, for example, at myToys.

Kivanta Stainless Steel Bottle “Love Earth”

The Kivanta stainless steel bottle holds 750 ml, is 100 percent BPA-free, and comes in a striking limited edition with a laser-engraved “Love Earth” design. Its rounded corners make it easy to clean, leaving no hiding places for germs or bacteria, and it’s dishwasher-safe too. Price without lid (sold separately): €20.42. Available, for example, from the Kivanta online shop.

The Zoo Stainless Steel Kids’ Thermos “Fox”

This double-walled stainless steel thermos keeps drinks hot or cold and holds 250 ml, making it ideal for first-graders who prefer a smaller, easier-to-handle bottle. Its charming woodland animal designs — fox, deer, wolf, or bear — are a hit with kids and a lovely detail in their own right. The stainless steel is free of plasticizers and other harmful substances. Price: €14.95. Available, for example, at Avocadostore.