ADULT SUPERVISION IS REQUIRED at all times. Do not use the Bottlecuffs with an attached bottle in motion. Car seat should be stationary at all times. Each product was hand-made so measurements maybe slighltly off. The straps will fray a little after multiple uses due to the fabric material. The Bottlecuff usage is typically for babies from 4-8 months. Actual month may vary. Miso Family LLC is not liable.