These are a great option that I've used in the past! You can also search for wine bags or plastic liquor bottles on Amazon to see a few other options!

https://www.amazon.com/dp/B00MJ21YTI/ref=cm_sw_r_cp_apa_glt_fabc_5J9AZZYM8GSWNY8BQTRE

Edit: these aren't highly rated for traveling on Amazon so maybe search for a liquor pouch instead!