myColdCup 8oz with Freeze Stick. Keeps milk, smoothies, yogurt drinks ice-cold for lunch. Triple-walled vacuum insulated stainless steel thermos. BPA-free (Green) No more sour or slightly warm milk for lunch. Keep cold drinks ice-cold for 5 or more hours, that's below 40F (4C). The freeze stick inside takes the temp down to 36F (2C) for several hours. Extra freeze stick included so you always have one ready to go. Made from HDPE (plastic No.2) pharmaceutical grade plastic (even higher quality than food-grade) with pure distilled water inside. Easy to clean design (rounded corners, stay-clean sealing ring design, extra wide mouth for easy filling and cleaning) 18/8 Stainless steel, triple-walled, vacuum insulation for High Performance. Ergonomically designed and won't sweat. No BPA, phthalates, lead, or other harmful substances. Food-grade inside and out, even the silicone base is food grade; reusable/recyclable. Fill with cold drinks from the fridge. Put Freeze stick in freezer overnight. Freeze stick easily snaps into the lid. Eco-friendly and kid-friendly. Save the planet from milk carton and juice box waste.