It's an odd time in your life when half of your friends go out to the bar on Saturday night and the other half sits in and watches movies. Now, depending on your friend, you have three ways that your 21st birthday gift idea can go.
1. For The Chill Friend
If you have that one friend who always seems to be the rule follower and doesn't ever really go out and let their hair down, there is only one way to go: Lots Of Liquor. It's finally there chance to go out and get crazy. You, as their honorary bff, have no choice but to go all out and get them a full on basket of individual liquor bottles, bottles of mixers, and goodies to snack on! Another gift you're going to be obligated to throw in, though they may not notice, is that you'll be deemed the responsible one. Switch roles for a night and make sure your friend isn't totally re-tasting what they'd eaten for dinner... you want them to at least last through the pregame.
2. For The Party Friend
We've all got the friend who's been breaking rules since they were able to walk. High school came around and you weren't even the least bit surprised that they were pregaming the football games in the parking lot. So, to them, happy 21st just means they can throw away their fake ID and use their real one. If this is the case, it's safe to assume they have all the necessary alcohol they want and they also already know what they like. The best gift to a party happy friend is a nice recovery basket for the next day. This should be stuffed with all the necessities, Advil, Pedialyte, and other the other day after must-haves.
3. For The Normal Friend
All of our friends are not going to be crazy, out-of-hand rule breakers or goody-too-shoes. Sometimes you're going to have a friend who plays by the rules... most of the time. If this is the case, there is only one way to go: a little bit of both. You could probably be safe with a cute hand painted wine glass and a bottle of their favorite, but where is the fun in that? They know enough about alcohol to assume they will surely need that hangover kit the next day, but not enough to have it stocked and ready to party on their big day.