I use the Ram Butler cup holder mounted on handlebars with a yeti / contigo cup cup filled with ice / add water as needed
I use on my kayak on the bay here in Destin, FL fishing 6 hours in sun. 2 yeti cups filled with ice and a few 1/4 gator aid filled with water.

No beer or soda in the heat

Stevenolts I just rode 15 hours from St Louis to Destin Fl 2 weeks ago / I almost froze to death the first half / the second half it was hot as hell