You don't have to be into Stanley tumblers, I have a variety of different versions, and this carrier bag fits them all. I personally find this attachable carrier very useful, because I don't always want to carry a purse or bag around. This is great for on the go, fits my phone, keys, card, and additional items. It actually holds more than I expected, but so handy. stanley tumbler stanleyaccessories tumbleraccessories wrinklefreestraw straw carrierbag attachablebag #slingbag amazonfind amazonmusthave amazonfashionfind LTKHome LTKSummerSales LTKSaleAlert