Keep cups.

The combination of form, functionality and eco-friendliness makes these cups worth holding on to.

1 Brew Cork edition, $30, from Keep Cup. 2 Ceramic cup in Aqua, $40, from Claycups.

3 Mystic Mauve cup, $27.99, from Sol Cups. 4 To Go Click in Soft Lavender, by Stelton, $59.50, from The DEA Store.

5 Nia reusable cup, $19.95, from Country Road. 6 Next Generation Visa pay Wave in Cool Grey base, $39.95, from Frank Green. 7 Sandy Planet handmade ceramic cup, $35, from Pottery for the Planet.

8 Pretty in Pink handmade ceramic cup, $35, from Pottery for the Planet.