Not my first choice but I have used them when all my glass carboys were filled. I still keep some in case I need them again.
The main problem with the ones I have is that they have a built in hollow handle. That makes them easy to carry but a real pain to clean.
If they are free and can be...
Since you have a small vineyard it may be worthwhile to bag your grapes.
I only have about 20 vines in production this year so it didn't take too long to cover the clusters. Last year every single cluster I didn't bag was eaten by birds.
North Georgia, near Atlanta, climate zone 7b.
(Top photo) I have a little vineyard in the front yard with 24 Cynthiana / Norton and 6 Lenoir / Old Spanish "Favorite" variety. I had a couple rows of Blanc du Bois, a white wine variety developed in Florida but it got hit by black rot so bad...
I live about 40 miles north of Atlanta. I have a mini-vineyard (minyard?) of 30 French Hybrids (Cynthiana / Norton and Old Spanish / Lenoir). Yes, both varieties have two names. So last year I had 6 vines in production, picked a bushel of grapes and made one gallon of wine. This year 20...