The Bottle Keeper by Mommy's Helper helps keep your baby's bottle clean and nearby at all times. Now you can keep your bottles from being dropped and lost. The patented bottle strap easily attaches to all sizes of bottles. Equipped with two size ring bottle holders. The smaller ring fits most regular bottles, while the larger ring fits angled bottles. Can be adapted to fit most non-spill cups Not for use with glass bottles Ages 6 months + Bottle not included