Platex Vent Air Gift Set

I got these Platex Vent Air Wide bottle Gist set for my baby shower. I have never used them there is 2 large bottles and 3 small there is also a couple extra nipples in there. I have opened the box but never used decided to go with a diffrent type of bottle .

The Playtex VentAire Advanced wide bottle system is 100% BPA free. VentAire Advanced is clinically shown to reduce gas, spit up and colic as well as help prevent ear infections. The new and improved silicone vent allows for an improved flow rate, making it easier for baby to drink. The wide nipple with a raised textured area is designed to make it easy for baby to switch between breast and bottle. Also available in standard bottles.
•100% BPA free
•VentAire Advanced is clinically shown to reduce gas, spit up and colic as well as help prevent ear infections
•New and improved silicone vent allows for an improved flow rate, making it easier for baby to drink
•Wide nipple with raised textured area designed to make it easy for baby to switch between breast and bottle
•Clear, premium plastic shatter-proof bottles
•Reusable bottles have micro-channel vent technology that vents air at the back of the bottle versus through the nipple
•Helps prevent air from mixing with the milk and provides a virtually bubble-free feeding
•Angled bottle supports semi-upright feeding position to help prevent ear infections