Freezing Cum Techniques

[someguy1234]

Need advice. My girlfriend has confessed she thinks it'd be a big turn on for me to cum in her alcoholic beverage which she drinks in a bar or club without anyone else being any the wiser.

I really don't think I can jerk off into her glass in the mens room stall so I'm thinking of cumming in advance and storing it.

If I came into a Zip lock bag in the morning and then kept it in the fridge unfrozen until the late evening. What would happen? Would it be ok?
Would it last in a ziplock bag unfrozen for the better part of the day?

Need answers quick as this would be tomorrow evening that this happens.