Inflatable drinks holders.
You can order these from here for about 5.99. Located in the UK for fast postage. Order Inflatable Drink Holders
Inflatable drinks holders.
As you can see in the video these are very stable and DO WORK! They also look and add a lot of fun to your holiday. They don't take up space when deflated and work well in the bath too..what more do you want for £4?