The SideFill was designed to take up as little space as possible in your pocket. That's why it has a single-wall construction and is not insulated.

Based on our own experience, it still keeps its contents cool for several hours, but it does not offer active insulation like a double-walled bottle.

A neoprene sleeve will be available soon. This significantly improves insulation and offers additional protection for everyday use.

The SideFill bottle is made of 100% stainless steel and is therefore particularly easy to clean, unlike conventional water bottles, which often consist at least partially of plastic.

Here's how:

1. Add dish soap: Add some dish soap to the SideFill.
2. Open closures: Open both closures of the bottle.
3. Fill with warm water: Pour warm water into the bottle from the side.

The water enters the bottle from the side and flows out of the drinking opening. The flow cleans the bottle.

Yes, we are already working on another size. This is expected to be available in our online shop in mid-2026.

"You have two main advantages that regular water bottles do not offer you."

1. Practical Filling: You can also refill the bottle at small sinks. This saves you time and gives you more flexibility in your daily life.

2. Space-saving design: The flat design of the bottle gives you back space in your bag. This gives your bag a pleasant, tidy feeling, and you have more room for other things.

Yes, the SideFill team carried out the entire process themselves – from identifying the problems of conventional water bottles to design and development, all the way to final implementation.

The SideFill bottle is "in the patent application."