This Feeding Bottle is an BIS 5168:2018 certified brand and our products meet the best of standards., It is an Anti-Colic glass feeder is made up of high borosilicate glass and comes with ultrasoft flow control ring nipple/teets., The ToddleBee Silicone Warmer Feeder comes with a colourful silicone sleeve which is very grippy and gives a good protection against breakage, they are light and convenient to carry along, safe, non-toxic & BPA free., Taste and Odor Resistance: Glass doesn’t retain flavors or odors, ensuring that the milk tastes fresh every time., Glass bottles are durable and can be reused for years, making them a cost-effective choice in the long run., Eco-Friendly: Glass is a recyclable material and is more environmentally friendly compared to single-use plastics., Glass doesn’t retain flavours or odours, ensuring that the milk tastes fresh every time., Clarity: Glass bottles offer clear visibility of the contents, making it easy to measure and monitor the amount of milk.