Just heat it. If it is necessary to bend the PPR tube into U-shape, L-shape and S-shape, it should be heated with a hot air blower, and it should not be baked with open flame. When bending PPR pipe, the pipe should be heated to about 65438 050℃. The straw is a cylindrical hollow plastic product. Its main function is to drink from a cup, and it can also absorb the bone marrow of some cooked animal long bones.