Cylinder and Low Vase Recs
An ideal vase is ceramic and not see through. You probably have the basic shaped vases necessary. Some of these are used by florist for standard flower deliveries. For my classes I recommend vases:
Dimensions: Strongly prefer 9.5” or shorter. Mouth diameter no larger than 4.5” for tall vases.
For shorter vases the diameter should be less than 6” in. Shorter being qualified as less than 4.5” tall.

This is what I highly recommend. It can be glass or ceramic

Harder to use, but I can provide something to make it easier.

Also harder to use, but I can provide something to make it easier.

Depending on the composition this shape can be very difficult to use.
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You can also use a pitcher.