grosmimi stainless steel baby straw cup, spill-proof, 12m+, 10oz (balloon) | stage 2 | flip-top | insulated vacuum sippy cup | babies & toddlers | rotating handles | silicone straw | bpa-free | 300ml balloon 10 ounces is up for auction in Baby Products. The current bid is $5.50, 88% below the $46.80 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.