Before first use:
We recommend sterilizing the bottles in boiling water for 2 to 5 minutes before first use. We do not recommend utilizing sterilizers, as we cannot guaranty that the ones on the market were made with safe materials. While the baby bottles are technically microwave-safe, we strongly suggest that parents do away with the use of microwaves for all items and products destined for your little one.
To prepare the nipple for first use, please squeeze the top of the nipple and the venting tube. You will want to make sure that both open properly. When tightening down the collar of the bottle, do not over tighten, as this will reduce the amount of airflow into the baby bottle
What nipple flow should I use?
Thinkbaby baby bottles come outfitted with Stage A nipples. The nipples are designed for newborns to 6 months. The flow rates are determined by averages. Depending on your little one you may need to adjust which flow rate that you purchase. The chart below should provide help in determining which to purchase.
We highly recommend that parents are purchasing at least 4 additional baby bottle nipples per stage.
Childs Age Suggested Flow Rate
0 to 6 months Stage A Nipples
6 + months Stage B Nipples
9 to 36 months Sippy Cup Spouts
18 to 48+ months Thinkster straws
Baby bottle nipples and spouts made from silicone will typically last 2 to 3 months prior to needing replacement. If you notice tears or breakage, discontinue use.
How to prevent nipple collapse?
With cross cut nipples it is important that you have the right nipple flow for your child's age. The suggested age range is listed above. This is the number one reason for nipple collapse across baby bottle lines. Please note that these numbers are based on averages. If you have an especially fast or slow feeder on your hands, you may need to adjust your movement between flow levels.
Do not over tighten the collar, as this will restrict the airflow.