Sen. Marco Rubio (R-Fla.) had some hilarious advice for Sen. Joni Ernst (R-Iowa), who will deliver the GOP response to next Tuesday's State of the Union address.

Ernst today announced in a statement that she would be delivering the Republican response, to follow President Barack Obama's remarks.

"I am truly honored to announce that I will be delivering the Republican Address to the country following the President's ‪#‎SOTU‬ address," she said on Facebook. "It's a long way from Red Oak to Washington, but now that I am here, I am excited to get to work to craft and implement real solutions as we chart a new path forward for our great nation."

Rubio, who delivered the 2013 GOP response with the help of a now famous water bottle, had some advice for Ernst:

 

Congrats to @joniernst chosen to give #GOP response to #SOTU. You will do great. Only advice is have plenty of water BEFORE not during!

A photo posted by Senator Marco Rubio (@marcorubiofla) on