Easy to use, clean, and virtually unbreakable.

 When filled they weigh only 8 ounces so they are perfect for RV use!

 Included: two one-ounce dishwasher-safe plastic jars with lids to allow for easy changing of food.

 1-3 hummingbirds empty one jar of food in about 2 days (depending on the time of year, other available food sources, whether one bird is capable of defending the feeder from other birds, etc).

 It's best to change the food daily if you are truly worried about bees and wasps. (Because the hummingbirds might dribble on the lid, and any food on the outside is available to bees).