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https://rttmbabytravelgear.com/simba-crystal-romance-wide-neck-borosilicate-glass-feeding-bottle-9-oz-sky-blue-packs-of-3/

Product Features
Made of medically hi-graded and heat-proof glass, completely seamless and smooth surface without accumulation of milk residue.Heat-resistance up to 1112°F and can safely endure sudden temperature change from 482°F to 70°F.The diamond light glass feeding bottle is highly transparent and printed with imported non-toxic, lead-free ink from JapanUnique non-impression printing technology. No peeling-off or scatches of the mark.Super light bottle, ideal for traveling.