DIY Pattern-Dipped Bud Vases - Brit + Co
This is a really simple DIY that you could complete in under 30 minutes, all you need is some pens, painters tape and a plain vase.
Make Your Own Flower Vase - A Beautiful Mess
Everything seems a bit brighter and happier when you have flowers in the house, so I love this tutorial from A Beautiful Mess.
DIY mason jar flower pot lids:
Lightbulb vase. So cheap to make! :)
Enamel paint swirled inside glasses and jars to make these lovely vases: