Vigna’s designs are sculptured out of multiple layers of glass. The birds look compact, but are surprisingly heavy. Toikka specialized more in unique crystal designs, and features the designers’ signature on the base. Penttinen’s birds are bold and bright, with an urban inspiration behind them. Each of Penttinen’s bird has a unique personality, quirky features, and even a name. They are quite pricey though, so this gift is best given to a very dear acquaintance or friend.