The Twist Squeeze Bottle Base prevents your Twist Squeeze Bottle from slipping. Use this base for convenient securing of your squeeze bottle. What it does: This grippy base will help your Twist Squeeze Bottle remain upright, which will in turn keep your milk in the storage bag. Why you'll love it: This no-slip bottle base prevents sliding on your counter and moving around in your fridge. It’s BPA, PVC, and phthalate-free and recyclable. Does not include a bottle or nipple. Works with: Twist Squeeze Natural Feeding Bottle