Ritz crackers

Heading back home today after my farewell gig last night I thought I was still suffering side effects from my Innes & Gunn. Turns out I wasn't. These two happy ladies were actually dressed like this for a trip to see 'Puttin'on the Ritz' at the Playhouse.

I'm sure they have thought this through and come up with a solution but just how do you go to the toilet in these things? I hope they enjoyed the show and aren't too deflated afterwards...