Sippi 1
My first cup

A significant problem many parents aren't aware of is vacuum, which forms in most baby bottles and cups. Vacuum has been proven to be a major cause of gas, colic and even ear infections since it forces baby to suckle extra hard in order to extract milk from the cup. Bfree has a patented air vent that helps prevent vacuum formation, helping baby to suckle comfortably and control the flow of liquid, without causing pressure in the ear. This unique air vent is found in all Bfree bottles and cups and grows with your baby from age   0-3.

Why is vacuum problematic?
Think what happens when you drink directly from a bottle containing soda or water. Every few sips, you have to stop and pull the bottle away from your mouth to release the vacuum that has accumulated in the bottle. Without releasing the vacuum, you wouldn’t be able to continue drinking. That is exactly what happens to your baby when they suckle out of most baby bottles and sippy cups. Your baby is forced to work harder and harder as the pressure in the bottle grows, and even stop every few sips to release the vacuum. Sometimes you can even see the teat collapsing during suckling (another symptom of vacuum) and air bubbles forming in the liquid.

Less vacuum – it's proven
A comparative test proved that Bfree bottles were the most effective in neutralizing vacuum compared to other leading baby bottles:

The Sippi cup's spout is extremely soft and sensitive. Its pleasant texture helps calm sensitive gums during teething and makes it easier for baby to transition from the bottle to a cup.