Two-Mouth Shareable Water Bottle with a Pull-Out Second Spout

The problem

According to the patent, people often end up sharing one bottle of water, but because everyone drinks from the same mouth, many worry about hygiene and either refuse, pour into their mouth from above and spill on their clothes, or leave the rest of the water to be thrown away. The patent sets out to let two people drink from the same bottle using different mouths.

The solution

1. The fixed mouth (1), the threaded collar (3) and the bottle (8) are one piece. The fixed mouth is a truncated cone.
2. A movable mouth (2), also a truncated cone, sits in the gap between the fixed mouth and the collar and is lower than the collar when pushed down.
3. A flexible catch (4) of soft silicone on top of the movable mouth bends to snap into a notch (7) at the top of the collar.
4. The cap (10) screws onto the collar’s outer thread (5) with its inner thread (9), pressing the catch against the collar wall, while a rubber seal ring (6) in the cap presses on the top of the fixed mouth.
5. To use the second mouth, the catch is freed from the notch and the movable mouth is pulled up. The diameters are chosen so that the fixed mouth’s wide rim (11) is smaller than the movable mouth’s wide rim (12) and larger than its narrow rim (13), so the friction between the cones holds the movable mouth up.

Who it is for

• Drinkware brands looking for a simple, demonstrable feature in a crowded water bottle market.
• Sports and outdoor retailers selling bottles for team practice, hiking and road trips.
• Promotional products companies that want a bottle with a talking point for events and giveaways.
• Family and kids’ bottle brands where siblings and parents share one bottle.

How it works

The main parts

Using it

1. Unscrew the cap and drink from the inner mouth as usual.
2. To share, flip the silicone catch out of its notch and pull the outer mouth up - it stays up by friction.
3. Hand the bottle over - the other person drinks from the raised outer mouth.
4. Push the outer mouth down until the catch clicks into the notch, and screw the cap back on.

Applications

Couples and friends on the go

Two people share one bottle on a walk or drive without sharing a rim.

Team sports practice

Coaches and players often pass bottles around; a second mouth reduces direct contact.

Families with children

Parents and kids can share one bottle on outings, with each using their own mouth.

Hiking and travel

Carrying one bottle for two people saves weight and space in a daypack.

Events and promotions

A bottle with a clear “share it” story suits marketing campaigns and giveaways.

Where it is less suitable

• Medical-grade hygiene - two mouths reduce rim contact, but the water inside is still shared.
• Carbonated drinks - the extra joint between the cones is not designed for pressure.
• Insulated steel bottles - the patent’s nested cones suit molded plastic; a double-wall steel version needs redesign.