You would need a water proof bag and the work is simple. It is basically a pump gun that has a tube going to the bag and the bag has water that goes through the gun when the gun is being pumped.
Pack your overnight bag with all the essentials so you can focus on having a romantic night. Make sure to include toothbrushes and toothpaste, sleepwear, face wash, and whatever else...
Pack a large bag with lots of water (and some juice). Bring some Ibuprofen in case of headache. Bring snacks (pretzels, chips, crackers, fruit, or anything else) and money so...