A not so frugal option, we have something like this but ozark trail brand and use it for camping all the time. It works great! Ours came with travel wine tumblers too!

Triple Insulated Stainless Steel Vacuum Insulated Wine Bottle -24-hour Temperature Retention- 750ml Wine Canteen Made of Shatter Proof 18/8 Stainless Steel, BPA FREE Lids, Perfect for Travel & Picnic https://www.amazon.com/dp/B01MT7TPK5/ref=cm_sw_r_cp_api_glt_fabc_84Y0A650BH5D91215VJB?psc=1