I'm flying to London and returning from Paris. It's been awhile since I flew, wondering about what size 'purse' is allowed on Air Transat. Also, any feedback on Air Transat flights. I'm a bit worried about getting enough to drink - soft drinks/water. Some reviews were saying that it was hard to get service in economy. As we can't carry our own drinks due to security issues, and knowing the high cost of anything at the airport, this is an issue.